In Context

50 And David prevailed over the Philistine, with a sling and a stone, and he struck, and slew the Philistine. And as David had no sword in his hand,

51 He ran, and stood over the Philistine, and took his sword, and drew it out of the sheath, and slew him, and cut off his head. And the Philistines seeing that their champion was dead, fled away.

52 And the men of Israel and Juda rising up shouted, and pursued after the Philistines till they came to the valley and to the gates of Accaron, and there fell many wounded of the Philistines in the way of Saraim, and as far as Geth, and as far as Accaron.

53 And the children of Israel returning, after they had pursued the Philistines, fell upon their camp.

54 And David taking the head of the Philistine brought it to Jerusalem: but his armour he put in his tent.

55 Now at the time that Saul saw David going out against the Philistines, he said to Abner the captain of the army: Of what family is this young man descended, Abner? And Abner said: As thy soul liveth, O king, I know not.

1 Samuel 17:53 in Other Translations