1 Samuel 17:40-42

Then David took his shepherd’s staff, selected five smooth stones from the brook, and put them in the pocket of his shepherd’s pack, and with his sling in his hand approached Goliath. As the Philistine paced back and forth, his shield bearer in front of him, he noticed David. He took one look down on him and sneered—a mere boy, apple-cheeked and peach-fuzzed.