1 Samuel 17:40-50

40And David took his staff in his hand, selected five smooth stones from the brook, and put them in the pouch of his shepherd’s bag. And with his sling in hand, he approached the Philistine.

41Now the Philistine came closer and closer to David, with his shield-bearer before him. 42When the Philistine looked and saw David, he despised him because he was just a boy, ruddy and handsome. 43“Am I a dog,” he said to David, “that you come at me with sticks?” And the Philistine cursed David by his gods. 44“Come here,” he called to David, “and I will give your flesh to the birds of the air and the beasts of the field!”

45But David said to the Philistine, “You come against me with sword and spear and javelin, but I come against you in the name of the LORD of Hosts, the God of the armies of Israel, whom you have defied. 46This day the LORD will deliver you into my hand. This day I will strike you down, cut off your head, and give the carcasses of the Philistine army to the birds of the air and the creatures of the earth. Then the whole world will know that there is a God in Israel. 47And all those assembled here will know that it is not by sword or spear that the LORD saves; for the battle is the LORD’s, and He will give all of you into our hands.”

48As the Philistine started forward to attack him, David ran quickly toward the battle line to meet him. 49Then David reached into his bag, took out a stone, and slung it, striking the Philistine on the forehead. The stone sank into his forehead, and he fell facedown on the ground.

50Thus David prevailed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him.