1 Samuel 17:20-24

And David rose early in the morning and left the sheep with a keeper and took the provisions and went, as Jesse had commanded him. And he came to the encampment as the host was going out to the battle line, shouting the war cry. And Israel and the Philistines drew up for battle, army against army. And David left the things in charge of the keeper of the baggage and ran to the ranks and went and greeted his brothers. As he talked with them, behold, the champion, the Philistine of Gath, Goliath by name, came up out of the ranks of the Philistines and spoke the same words as before. And David heard him. All the men of Israel, when they saw the man, fled from him and were much afraid.