1 Samuel 17:40-42

Then he took his staff in his hand, chose five smooth stones from the stream, put them in the pouch of his shepherd’s bag and, with his sling in his hand, approached the Philistine. Meanwhile, the Philistine, with his shield bearer in front of him, kept coming closer to David. He looked David over and saw that he was little more than a boy, glowing with health and handsome, and he despised him.