1 Samuel 17:55-57

Young's Literal Translation

⁵⁵ And when Saul seeth David going out to meet the Philistine, he hath said unto Abner, head of the host, `Whose son [is] this -- the youth, Abner?' and Abner saith, `Thy soul liveth, O king, I have not known.'

⁵⁶ And the king saith, `Ask thou whose son this [is] -- the young man.'

⁵⁷ And when David turneth back from smiting the Philistine, then Abner taketh him and bringeth him in before Saul, and the head of the Philistine in his hand;