1 Samuel 17:57 YLT

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;

⁵⁸  and Saul saith unto him, 'Whose son 'art' thou, O youth?' and David saith, 'Son of thy servant Jesse, the Beth-Lehemite.'