1 Samuel 17:45-55

45 Then said David to the Philistine, You come to me with a sword, and with a spear, and with a javelin: but I come to you in the name of Yahweh of hosts, the God of the armies of Israel, whom you have defied.
46 This day will Yahweh deliver you into my hand; and I will strike you, and take your head from off you; and I will give the dead bodies of the host of the Philistines this day to the birds of the sky, and to the wild animals of the earth; that all the earth may know that there is a God in Israel,
47 and that all this assembly may know that Yahweh doesn't save with sword and spear: for the battle is Yahweh's, and he will give you into our hand.
48 It happened, when the Philistine arose, and came and drew near to meet David, that David hurried, and ran toward the army to meet the Philistine.
49 David put his hand in his bag, and took there a stone, and slang it, and struck the Philistine in his forehead; and the stone sank into his forehead, and he fell on his face to the earth.
50 So David prevailed over the Philistine with a sling and with a stone, and struck the Philistine, and killed him; but there was no sword in the hand of David.
51 Then David ran, and stood over the Philistine, and took his sword, and drew it out of the sheath of it, and killed him, and cut off his head therewith. When the Philistines saw that their champion was dead, they fled.
52 The men of Israel and of Judah arose, and shouted, and pursued the Philistines, until you come to Gai, and to the gates of Ekron. The wounded of the Philistines fell down by the way to Shaaraim, even to Gath, and to Ekron.
53 The children of Israel returned from chasing after the Philistines, and they plundered their camp.
54 David took the head of the Philistine, and brought it to Jerusalem; but he put his armor in his tent.
55 When Saul saw David go forth against the Philistine, he said to Abner, the captain of the host, Abner, whose son is this youth? Abner said, As your soul lives, O king, I can't tell.
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