While King Saul of Israel was fighting a war against the Philistines, a giant soldier of the Philistines’ army came and defied the Israelite army.

“Send a man who dares to fight me,” said Goliath, the giant. “If he kills me, the Philistines will be your servants. But if I kill him, you will be our slaves!”

Not one soldier in King Saul’s army dared answer the challenge to fight the biggest, strongest, most feared man of all the Philistine soldiers. Unexpectedly, a young man spoke up, “I’ll do it.”

This young shepherd, who was not a soldier, valiantly faced the fierce giant armed with only a sling and a few stones. “You come with a sword and a spear and a shield,” the boy cried. “But I come in the name of the Lord God who will give me the victory!”

And God did! The name of the young shepherd was David, who later became the king of Israel.

You can read this story in 1 Samuel chapter 17.