How attentively David looks at the stones in his hand. His sling is on his arm, and his bag by his side. What is he about to do with those stones? And who is that tall man in armour, strutting about with such a long spear in his hand?
Two armies were drawn up in battle array. They were the armies of the Israelites and Philistines. The camp of the Israelites was on one hill, and that of the Philistines was upon another; a valley lying between. For forty days these armies had been facing each other, but yet the battle had been delayed. The Philistines had on their side a giant of great height and strength, encased in armour, who daily came out, challenging the Israelites to send a man from their camp to fight with him. But no man among them dared to go against Goliath, the Philistines' champion.
Meanwhile Jesse had sent David to the Israelites' camp to see after his brethren. He heard what the giant said, and offered to go out against him. Saul was informed of David's offer, and sent for him. Saul told David he was not able to fight the giant, but he boldly replied, "The Lord which delivered me out of the paw of the lion and out of the paw of the bear, He will deliver me out of the hand of this Philistine." David trusted not in his own power, but in God! Then Saul said, "Go, and the Lord be with thee."
He went, slung one of the smooth stones he had chosen out of the brook, smote the Philistine in the forehead so that he fell to the earth, and then ran and cut off his head. Thus God enabled this ruddy youth to overcome the giant Philistine, and to slay him with a sling and a stone.
From Mother Stories from the Old Testament, by Anonymous (public domain; originally printed in 1908)