The Philistines gather for war at Socoh in Judah, and Saul draws up Israel against them in the Valley of Elah, with a valley between the two armies. From the Philistine ranks steps Goliath of Gath, a champion of enormous height, wearing bronze armor and carrying a heavy spear. Every morning and evening for forty days he proposes that one man of Israel fight him to decide the war. Saul and all Israel are terrified.
David, the youngest son of Jesse of Bethlehem, goes back and forth between tending his father's sheep and serving Saul. Jesse sends him to the camp with grain, bread and cheeses for his three oldest brothers. There David hears Goliath's challenge, is outraged that this man defies the armies of the living God, and asks what will be done for the one who defeats him. His oldest brother Eliab is angry with him, but David persists until he is brought before Saul.
Saul doubts him because of his youth, but David explains that as a shepherd the Lord rescued him from the lion and the bear. Saul offers his own armor, but David cannot walk in it and takes his staff, five smooth stones from the brook and his sling. Before the fight he declares that he comes in the name of the Lord of hosts, so that all the earth may know there is a God in Israel. One stone strikes Goliath's forehead and he falls; David finishes him with the giant's own sword. The Philistines flee and Israel pursues them. David takes the head to Jerusalem and keeps the weapons in his tent. The chapter closes with Saul asking whose son this young man is.