1 Samuel 17:49-50

MKJV(i) 49 And David put his hand into his bag and took a stone from there, and slung it and struck the Philistine in his forehead, so that the stone sank into his forehead. And he fell on his face to the earth. 50 And David was stronger than the Philistine with a sling and with a stone. And he struck the Philistine, and killed him. But no sword was in the hand of David.