1 Samuel 17:45-49

Then David said to the Philistine, “You are coming to me with a sword, a spear and a javelin, but I am coming to you in the Name of ADONAI-Tzva’ot, God of the armies of Israel, whom you have defied. This very day ADONAI will deliver you into my hand, and I will strike you down and take your head off you, and I will give the carcasses of the Philistines’ camp today to the birds of the sky and the wild beasts of the earth. Then all the earth will know that there is a God in Israel, and so all this assembly will know that ADONAI delivers not with sword and spear—for the battle belongs to ADONAI—and He will give you into our hands.” Then when the Philistine rose and began to advance, drawing near to meet David, David ran quickly toward the battle line to meet the Philistine. David put his hand in his bag, took from it a stone and slung it, striking the Philistine on his forehead. The stone sank into his forehead, so that he fell on his face to the ground.