1 Samuel 17:55

And when Saul saw David going out against the Philistine, he said to Abner, the captain of the army, Abner, whose son is this young man? And Abner said, On your life, O king, I have no idea.

1 Samuel 16:21-22

And David came to Saul, waiting before him: and he became very dear to Saul, who made him his servant, giving him the care of his arms.

1 Samuel 17:58

And Saul said to him, Young man, whose son are you? And David in answer said, I am the son of your servant Jesse of Beth-lehem.

Treasury of Scripture Knowledge

Summary

And when Saul saw David go forth against the Philistine, he said unto Abner, the captain of the host, Abner, whose son is this youth? And Abner said, As thy soul liveth, O king, I cannot tell.

Bible References

Whose son

1 Samuel 17:58
And Saul said to him, Young man, whose son are you? And David in answer said, I am the son of your servant Jesse of Beth-lehem.
1 Samuel 16:21
And David came to Saul, waiting before him: and he became very dear to Saul, who made him his servant, giving him the care of his arms.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain