The Lord shows Amos a first vision: locusts forming when the second crop begins to sprout, just after the king's mowing. When they had finished eating the grass of the land, Amos pleads that the Lord forgive, because Jacob is small and could not stand. The Lord relents and says it will not happen. The second vision is a fire that was drying up the great deep and consuming the land. Amos again pleads that it stop, because Jacob is small, and the Lord relents of this too.
In the third vision the Lord stands beside a wall built true to plumb, with a plumb line in his hand. He asks Amos what he sees and he answers: a plumb line. The Lord says he is setting it in the midst of his people and will no longer pass them by: the high places of Isaac will be made desolate, the sanctuaries of Israel laid waste, and he will rise against the house of Jeroboam with the sword.
Amaziah, priest of Bethel, sends word to King Jeroboam: Amos is conspiring against him, and the land cannot bear his words, for he says Jeroboam will die by the sword and Israel will go into exile. Amaziah tells Amos to flee to Judah, eat his bread there and prophesy there, but never prophesy again at Bethel, because it is the king's sanctuary and the temple of the kingdom.
Amos answers that he was no prophet nor a prophet's son, but a herdsman and a dresser of sycamore figs, and that the Lord took him from following the flock and told him to go and prophesy to his people Israel. Now hear the word of the Lord: you say do not prophesy, but your wife will be a prostitute in the city, your sons and daughters will fall by the sword, your land will be divided, you yourself will die in an unclean land and Israel will go into exile away from its land.