Old Testament · Prophecy

The Book of Joel: Author, Context and Complete Study

Joel turns a national disaster, a locust plague that stripped Judah bare, into a call to return to God with all the heart. He announces the day of the Lord, promises the Spirit poured out on all people and foresees God judging the nations and dwelling in Zion.

Updated on November 14, 2026

What is Joel about?

Joel is a short prophetic book that begins with a real catastrophe: swarms of locusts and a drought that destroyed Judah's crops and stopped the offerings in the temple. Joel sees in it a warning of the day of the Lord and calls everyone, from the elders to nursing infants, to fast and return to God with all their heart (2:12-13). God answers with mercy, promising to restore the years the locusts ate (2:25), to pour out his Spirit on all people (2:28-29) and to judge the nations in the valley of Jehoshaphat (3:2).

Author: Joel son of Pethuel (1:1), about whom nothing else is known. His name means the Lord is God, and tradition accepts him as the author of the book.
Date: Uncertain, since no king is named: proposals range from c. 835 BC to c. 500-400 BC, after the return from exile.
First readers: The people of Judah and Jerusalem, with their priests and elders, reeling from a devastating locust plague and drought that had stopped even the offerings in the temple.
Genre: Prophecy
Chapters: 3 chapters
Key verse: Joel 2:28

Historical context

Joel names no king and dates none of his oracles, so his period must be inferred. The temple is standing, with priests presenting grain and drink offerings (1:9, 13), and the leaders called to act are the elders and the priests (1:14; 2:16-17). The enemies named are Tyre, Sidon, Philistia, Egypt and Edom (3:4, 19), not Assyria or Babylon, and people of Judah have been sold to the Greeks (3:6) and scattered among the nations (3:2).

For these reasons scholars hold two main views. Some place Joel early, around 835 BC, when the boy king Joash was under the guardianship of the priest Jehoiada (2 Kings 11-12), which would explain why no king is mentioned. Many others date the book after the return from exile, about 500-400 BC, when Judah had no king, the second temple stood and Greek traders were active in the region. Either way, the message does not depend on the date: disaster had struck, and God's people needed to hear what he was saying through it.

Geographical context

Joel's world is small and centered on Jerusalem: Zion, God's holy mountain (2:1; 3:17), and the house of the Lord, where priests weep between the porch and the altar (2:17). The locusts strip the vines, fig trees, fields, orchards and pastures of Judah (1:7-12, 18-20), leaving a farming and herding economy in ruins.

Then the book's horizon widens. The northern army will be driven into a parched land, its front into the eastern sea, the Dead Sea, and its rear into the western sea, the Mediterranean (2:20). The nations gather for judgment in the valley of Jehoshaphat, a name meaning the Lord judges (3:2, 12), also called the valley of decision (3:14). Tyre, Sidon and Philistia had sold Judeans to the Greeks (3:4-6), Egypt and Edom become desolate (3:19), and a fountain flows from the temple to water the Valley of Shittim, the valley of acacias (3:18).

Why does the book of Joel exist?

Joel was written to help God's people read a disaster through the eyes of faith. The locust plague was not mere bad luck; it was a summons to wake up, lament and return to the Lord before a greater day of judgment came (1:15; 2:1). Joel calls priests, elders, farmers, drunkards and even newlyweds to stop everything, fast and cry out, because the Lord is gracious and merciful and may relent (2:12-14).

The book also widens hope beyond the immediate crisis. God answers repentance by restoring the land, but he promises much more: his Spirit poured out on all people, young and old, men and women, servants included (2:28-29); salvation for everyone who calls on his name (2:32); judgment on the nations that harmed his people; and his own presence dwelling in Zion forever (3:17-21). The New Testament announces the fulfillment of Joel's promise of the Spirit at Pentecost (Acts 2:16-21).

Outline of Joel

Joel 1:1-12
A land devoured by locusts
Joel asks the elders whether anything like this has ever happened. Wave after wave of locusts has eaten everything (1:4); vines and fig trees are stripped, grain and wine are gone, and even the offerings in the temple have stopped (1:9).
Joel 1:13-20
A call to fast and cry out
The priests are to put on sackcloth, declare a fast and gather the elders and the people at the house of the Lord to cry out to him (1:14). The day of the Lord is near; seed shrivels, cattle groan and fire has consumed the pastures.
Joel 2:1-11
The army of the day of the Lord
The trumpet sounds in Zion. A great army like none before advances like fire, leaving the land a wilderness, scaling walls and entering windows like a thief. The Lord himself leads it, and the day is so great that no one can endure it (2:11).
Joel 2:12-17
Tear your hearts
Even now God calls his people to return with all their heart, with fasting and weeping. They are to tear their hearts, not their garments, because the Lord is gracious and merciful. Everyone is summoned, and the priests plead with God to spare his people.
Joel 2:18-27
The Lord restores the years
The Lord becomes jealous for his land and takes pity on his people. He will drive away the northern army, send grain, wine and oil with the early and latter rain, and restore the years the locusts ate (2:25), so that his people will know he is in their midst.
Joel 2:28-32
The Spirit poured out on all people
Afterward God will pour out his Spirit on all flesh: sons and daughters will prophesy, old men will dream dreams and young men see visions, and even servants will receive the Spirit. Signs in the heavens precede the day of the Lord, and everyone who calls on his name will be saved (2:32).
Joel 3:1-16
Judgment of the nations
God gathers the nations to the valley of Jehoshaphat to judge them for scattering his people, dividing his land and selling Judeans as slaves. The nations are told to beat plowshares into swords, but the harvest is ripe: multitudes fill the valley of decision as the Lord roars from Zion.
Joel 3:17-21
The Lord dwells in Zion
Jerusalem will be holy, the mountains will drip sweet wine and the hills flow with milk, and a fountain will come out of the house of the Lord. Egypt and Edom become desolate, Judah is inhabited forever, and the Lord dwells in Zion (3:21).

Famous passages in Joel

Joel 1:2-12
A land devoured by locusts
Joel opens with a disaster without precedent: what one kind of locust left, the next devoured, through four waves (1:4). The swarm is compared to a nation with lions' teeth (1:6). The passage is famous for its vivid portrait of loss, and Joel tells the people to recount it to their children for generations (1:3).
Study Joel 1 →
Joel 2:1-11
The day of the Lord like an army
A trumpet sounds on God's holy mountain as a vast army that looks like horses sweeps over the land, turning a garden like Eden into a desert. Sun, moon and stars grow dark, and the Lord thunders at the head of his army. Whether locusts or invaders, the scene displays the terror of God's judgment.
Study Joel 2 →
Joel 2:12-14
Tear your hearts, not your garments
God calls his people to return with all their heart and to tear their hearts rather than their clothing, because he is gracious and merciful, slow to anger and abounding in steadfast love. The words echo God's self-description in Exodus 34:6, and the passage is often read at the start of seasons of prayer and fasting.
Study Joel 2 →
Joel 2:23-27
Restoring what the locusts ate
God promises the early and the latter rain, threshing floors full of grain and vats overflowing with wine and oil, and the restoration of the years the locusts have eaten (2:25). The promise has comforted countless believers who felt that years of their lives had been wasted or lost.
Study Joel 2 →
Joel 2:28-32
The Spirit poured out
God promises to pour out his Spirit on all flesh, on sons and daughters, old and young, male and female servants, with wonders in the heavens before the great day of the Lord. On the day of Pentecost Peter declared that this prophecy was being fulfilled (Acts 2:16-21), and Paul quotes 2:32 in Romans 10:13.
Study Joel 2 →
Joel 3:9-16
Multitudes in the valley of decision
God summons the nations to war in words that reverse the vision of Isaiah 2:4 and Micah 4:3: they are to beat plowshares into swords and pruning hooks into spears (3:10). Multitudes gather in the valley of decision, the harvest is ripe, and the Lord roars from Zion as a refuge for his people (3:16).
Study Joel 3 →

Main themes

The day of the Lord: Joel names the day of the Lord five times (1:15; 2:1, 11, 31; 3:14). It is the day God acts decisively in history: darkness and judgment for his enemies and the unrepentant, deliverance for those who call on his name.
Repentance from the heart: Joel calls for fasting, weeping and sackcloth, but he insists on the heart: tear your hearts and not your garments (2:13). True repentance is a return to God himself, trusting his gracious character.
Grace and restoration: The Lord is gracious and merciful and relents from disaster (2:13). He answers his people's cry by restoring rain, harvest and the years the locusts ate (2:23-25), so that his people will never again be put to shame (2:26-27).
The Spirit for all people: In Israel's history the Spirit came mainly on prophets, kings and leaders. Joel foresees the Spirit poured out on all flesh, without distinction of age, sex or social standing (2:28-29), which is exactly what happened at Pentecost.
Creation in judgment and blessing: The ground mourns, the cattle groan and the wild animals pant for God (1:10, 18-20). When God restores his people, the land and the animals are told not to fear (2:21-22). Creation shares in both the curse and the renewal.
Judgment of the nations and God's presence: God will hold the nations accountable for their violence against his people (3:2-8, 19). History ends not in chaos but with the Lord dwelling in Zion, the land renewed and his people secure (3:17-21).

Main characters

Joel son of Pethuel: The prophet, whose name means the Lord is God (1:1). The book reveals nothing about his life, but his concern for the temple, its priests and its offerings suggests that he lived in or near Jerusalem.
The priests: The ministers of the altar and of the Lord (1:9, 13), who mourn because the offerings have stopped. Joel calls them to put on sackcloth, proclaim a fast and weep between the porch and the altar, pleading with God to spare his people (2:17).
The elders and people of Judah: Everyone is summoned: the elders, all the inhabitants of the land, children, nursing infants and even a bridegroom and bride on their wedding day (1:14; 2:16). Farmers and vinedressers mourn their ruined harvest (1:11).
The locusts: Four kinds or stages of locusts devour Judah (1:4; 2:25). Joel calls them a nation and God's great army (1:6; 2:11, 25), a picture of judgment that no human power can stop.
The northern army: The invader from the north whom God promises to drive away into a parched land (2:20). Interpreters debate whether it is the locust swarm described as an army or a human enemy pictured as locusts.
The nations: Gathered in the valley of Jehoshaphat, they are judged for scattering God's people, dividing his land and trading Judean children for a prostitute or for wine (3:2-3). Tyre, Sidon, Philistia, Egypt and Edom are named (3:4, 19).

In-depth study of Joel

Introduction

Joel is one of the shortest books of the Bible, only 73 verses, yet few books have shaped Christian faith so deeply. It begins with swarms of locusts darkening the sky and devouring every green thing in Judah. It ends with mountains dripping sweet wine and the Lord dwelling in Zion. In between, it gives the church one of its best-known calls to repentance (2:12-13) and the promise Peter quoted on the day of Pentecost: God will pour out his Spirit on all people (2:28).

Joel's great subject is the day of the Lord, the day when God steps into history to judge and to save. A natural disaster becomes a wake-up call. If locusts can ruin a nation in days, what will it be like when the Lord himself comes? Joel's answer is both sobering and hopeful: no one can endure that day, yet everyone who calls on the name of the Lord will be saved (2:11, 32).

Who wrote Joel and when?

The prophet

The book is the word of the Lord that came to Joel son of Pethuel (1:1). Nothing else is said about him: no hometown, no king, no story of his call. His name means the Lord is God, a confession that fits the book's message, and his close attention to the temple, the priests and the offerings suggests that he lived in Jerusalem.

Early or late?

Because Joel dates nothing, scholars weigh clues. Those who favor an early date, around 835 BC, point to the book's place in the Hebrew order of the Twelve, between Hosea and Amos; to enemies such as Philistia, Tyre, Egypt and Edom rather than Assyria or Babylon; and to the regency of the priest Jehoiada during King Joash's childhood, which would explain why elders and priests lead and no king appears.

Those who favor a date after the exile, about 500-400 BC, note that Judah has no king at all, the temple is standing, the people have been scattered among the nations (3:2), and Judeans have been sold to the Greeks (3:6). Joel also shares phrases with other prophets: compare Joel 1:15 with Isaiah 13:6, Joel 2:32 with Obadiah 1:17 and Joel 3:16 with Amos 1:2. Who borrowed from whom is debated, so these parallels cannot settle the date.

Literary style and structure

Two halves

Joel divides into two parts. In 1:1-2:17 the prophet speaks: he describes the disaster, calls for lament and urges the people to return to the Lord. In 2:18-3:21 the Lord answers: he takes pity on his people, restores the land, pours out his Spirit, judges the nations and dwells in Zion. The hinge is 2:18, where the Lord becomes jealous for his land.

Reversals

The second half undoes the first. The locusts eat the harvest (1:4), and God restores the years they ate (2:25). The grain, wine and oil fail (1:10), and the vats overflow (2:24). Joy withers from the people (1:12), and the land is told to be glad and rejoice (2:21). The people are a reproach among the nations (2:17), and God promises they will never again be put to shame (2:26-27).

Poetic power

Joel writes in urgent poetry full of commands: hear, wake up, weep, lament, put on sackcloth, blow the trumpet, gather the people. He describes the locusts with four different Hebrew words (1:4; 2:25), which may name different species or the stages of the insect's growth, and he paints the advancing swarm as a disciplined army with the look of horses and the sound of chariots (2:4-9).

Echoes of older Scripture

Joel's description of God in 2:13 repeats the confession of Exodus 34:6, also found in Jonah 4:2. His call to beat plowshares into swords (3:10) deliberately reverses Isaiah 2:4 and Micah 4:3: before the final peace comes the final battle.

Joel in the story of the Bible

Locusts were one of the covenant curses for disobedience (Deuteronomy 28:38, 42) and the eighth plague on Egypt (Exodus 10:12-15). At the dedication of the temple Solomon prayed that if locusts struck and the people prayed toward that house, God would hear and forgive (1 Kings 8:37-39). Joel calls the people to do exactly that. Moses once wished that all the Lord's people were prophets and that God would put his Spirit on them (Numbers 11:29); Joel promises that day will come.

The day of the Lord also appears in Amos (5:18-20), Zephaniah (1:14-18) and Malachi (4:5), but Joel gives it special prominence. In the New Testament Peter quotes Joel 2:28-32 to explain Pentecost (Acts 2:16-21), and Paul quotes 2:32 in his summary of the gospel (Romans 10:13). Revelation's locusts from the abyss have teeth like lions' teeth and sound like chariots rushing to battle (Revelation 9:7-9; Joel 1:6; 2:4-5), its sun turns black and its moon like blood (Revelation 6:12; Joel 2:31), and its harvest of the earth and great winepress echo Joel 3:13 (Revelation 14:14-20).

Joel and Jesus Christ

The giver of the Spirit. Peter explains that the exalted Jesus received the promised Holy Spirit from the Father and poured out what the crowd saw and heard (Acts 2:33). The God who promised through Joel to pour out his Spirit does so through his risen Son.
The Lord on whom we call. Joel promises salvation to everyone who calls on the name of the Lord (2:32). Paul quotes this right after saying that whoever confesses Jesus as Lord will be saved (Romans 10:9-13), and Peter ends his Pentecost sermon by declaring that God has made Jesus both Lord and Christ (Acts 2:36). The Lord of Joel is the Lord Jesus.
The day of the Lord. The New Testament speaks of the day of our Lord Jesus Christ (1 Corinthians 1:8) and of the day of the Lord coming like a thief (1 Thessalonians 5:2). Joel's day of the Lord finds its final form in the return of Christ.
Living water from God's house. Joel's fountain flowing from the house of the Lord (3:18) belongs to a stream of prophetic images, with Ezekiel 47 and Zechariah 14:8, that the New Testament fulfills in Jesus, who offers rivers of living water (John 7:37-39), and in the river of life of the new creation (Revelation 22:1).

Interpretive challenges

Locusts, soldiers or the end of the age?

Chapter 1 clearly describes an insect plague. In 2:1-11 the description intensifies: the invaders look like horses, sound like chariots and darken the sun and moon. Some read this as the same plague described poetically; others see a human army, perhaps Assyria or Babylon, pictured as locusts; still others see the end-time army of the day of the Lord. The text itself compares the locusts to an army and the army to locusts, so the overlap is intentional.

When are the signs of 2:30-31 fulfilled?

Peter quotes the signs in the sky along with the gift of the Spirit (Acts 2:19-20). Some see a partial fulfillment in the darkness at the crucifixion (Luke 23:44-45); many see a future fulfillment before Christ's return (Mark 13:24-26); others read the language as a traditional prophetic way of describing God's world-shaking intervention. All agree that Pentecost opened the last days.

Is the promise of the Spirit for Israel or for the church?

Joel addresses Judah, yet the promise reaches all flesh. Peter applies it to the crowd in Jerusalem and to all who are far off, everyone the Lord calls (Acts 2:39), and Acts shows the Spirit given to Samaritans and Gentiles (Acts 8:14-17; 10:44-47). Some interpreters also expect a further fulfillment for Israel at the end of the age.

Little-known facts

In Hebrew Bibles Joel has four chapters: 2:28-32 is chapter 3, and chapter 3 is chapter 4.
The ancient Greek translation places Joel fourth among the Twelve, after Hosea, Amos and Micah, instead of second.
More than ten other people in the Old Testament share Joel's name, including Samuel's firstborn son (1 Samuel 8:2).
The Hebrew phrase in 2:23 usually translated the early rain for your vindication can also be read as a teacher for righteousness, and some scholars connect it with the title of the leader of the Dead Sea Scrolls community, the Teacher of Righteousness.
In 1915 a severe locust plague struck Jerusalem and the surrounding region, and observers at the time compared what they saw with Joel's descriptions.

How to study Joel

Reading plan

Joel can be read aloud in about fifteen minutes; read it in one sitting first to feel its movement from disaster to hope. A group can study it well in three sessions: the disaster and the call to return (1:1-2:17), the Lord's answer and the Spirit (2:18-32), and the nations and Zion (3).

What to look for

The commands Joel gives and who receives them.
Every mention of the day of the Lord.
The reversals between the first and second halves.
The verses quoted in Acts 2 and Romans 10.

Teaching it in a Sunday school class or small group

Joel invites honest conversation about disasters. Jesus warned against concluding that victims of tragedy are worse sinners than others, while still calling everyone to repent (Luke 13:1-5); Joel likewise uses a catastrophe to call the whole community to return to God. Ask what a returning heart looks like today, how Pentecost fulfills 2:28-32 and what it means that God's Spirit is given to the young and the old alike. With children, tell the story of the locusts and God's promise to restore; with youth groups, stress that God's Spirit is poured out on young people, too.

Joel chapter by chapter

Every chapter of Joel with a summary, key verses explained, themes, people, questions with answers and application.

Frequently asked questions about Joel

Who wrote the book of Joel?

The book presents itself as the word of the Lord that came to Joel son of Pethuel (1:1), and tradition accepts him as its author. Nothing else is known about him; his name, meaning the Lord is God, was common in Israel. His familiarity with the temple and its priests suggests that he lived in Judah, probably in Jerusalem.

When was Joel written?

No one knows for certain, because the book names no king. Some date it around 835 BC, during the childhood of King Joash, when priests and elders governed. Many others date it after the exile, about 500-400 BC, pointing to the absence of a king, the standing temple, the mention of the Greeks (3:6) and the scattering of Israel (3:2). The message is clear either way.

What is the main message of Joel?

A disaster is a call to return to God before the greater day of the Lord. Joel urges repentance from the heart, because God is gracious and merciful, and he promises restoration, the outpouring of the Spirit on all people, salvation for everyone who calls on the Lord and God's final victory over the nations.

How many chapters does Joel have and how is it organized?

In English Bibles Joel has 3 chapters: the locust plague and the call to lament (1); the day of the Lord, the call to return, restoration and the promise of the Spirit (2); and the judgment of the nations and the blessing of Zion (3). Hebrew Bibles divide the same text into four chapters, with 2:28-32 as chapter 3.

Were the locusts in Joel literal?

Chapter 1 describes a real plague of locusts with drought, a disaster the ancient Near East knew well. Chapter 2 is debated: it may describe the same plague in heightened poetic language, a human army pictured as locusts or an end-time invasion on the day of the Lord. Many see a real disaster used as a preview of a greater judgment.

How is Joel 2:28-32 fulfilled at Pentecost?

When the Holy Spirit came on the disciples and they spoke in other languages, Peter explained that this was what Joel had prophesied (Acts 2:16-21). He introduced the quotation with in the last days where Joel has afterward, showing that the age of fulfillment had begun. Interpreters differ on whether the signs in the sun and moon are still future or partly fulfilled.

What is the valley of Jehoshaphat?

The name means the Lord judges, and Joel uses it for the place where God gathers the nations for judgment (3:2, 12), also calling it the valley of decision (3:14). Since about the fourth century AD tradition has identified it with the Kidron Valley east of Jerusalem, but the name may be symbolic rather than a point on a map.

What does it mean that God will restore the years the locusts have eaten?

In Joel 2:25 God promises to make up for the harvests the locust swarms destroyed by giving abundant crops again. Believers often apply it to God's power to redeem wasted or painful years. The promise reveals God's generous character, though it is first about Judah's land and harvests, not a guarantee of material prosperity.