1 Samuel 17:53-55

New King James Version

⁵³ Then the children of Israel returned from chasing the Philistines, and they plundered their tents. ⁵⁴ And 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 going out against the Philistine, he said to ^(A)Abner, the commander of the army, “Abner, ^(B)whose son is this youth?”

And Abner said, “As your soul lives, O king, I do not know.”