1 Samuel 17:40-44

He picked up five smooth stones from a stream and put them into his shepherd’s bag. Then, armed only with his shepherd’s staff and sling, he started across the valley to fight the Philistine. Goliath walked out toward David with his shield bearer ahead of him, sneering in contempt at this ruddy-faced boy. “Am I a dog,” he roared at David, “that you come at me with a stick?” And he cursed David by the names of his gods. “Come over here, and I’ll give your flesh to the birds and wild animals!” Goliath yelled.