And the king said, inquire thou whose son the stripling [is]. ] Still the question is the same, being very desirous of knowing of what family he was, for the reason before given, (See Gill on 1 Samuel 17:55).
54
And David taketh the head of the Philistine, and bringeth it in to Jerusalem, and his weapons he hath put in his own tent.
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.'
Young's Literal Translation is in the public domain.