1 Samuel 17:51

51 and David runneth and standeth over the Philistine, and taketh his sword, and draweth it out of its sheath, and putteth him to death, and cutteth off with it his head; and the Philistines see that their hero [is] dead, and flee.

1 Samuel 17:51 In-Context

49 and David putteth forth his hand unto the vessel, and taketh thence a stone, and slingeth, and smiteth the Philistine on his forehead, and the stone sinketh into his forehead, and he falleth on his face to the earth.
50 And David is stronger than the Philistine with a sling and with a stone, and smiteth the Philistine, and putteth him to death, and there is no sword in the hand of David,
51 and David runneth and standeth over the Philistine, and taketh his sword, and draweth it out of its sheath, and putteth him to death, and cutteth off with it his head; and the Philistines see that their hero [is] dead, and flee.
52 And the men of Israel rise -- also Judah -- and shout, and pursue the Philistines till thou enter the valley, and unto the gates of Ekron, and the wounded of the Philistines fall in the way of Shaaraim, even unto Gath, and unto Ekron,
53 and the sons of Israel turn back from burning after the Philistines, and spoil their camps.
Young's Literal Translation is in the public domain.