When Saul saw David go forth against the Philistine, he said to Abner, the captain of the host, Abner, whose son is this youth? Abner said, As your soul lives, O king, I can't tell.
Several things appear in this paragraph of great interest.  Saul is already jealous of the great victory David won, hence the belittling of his champion by such words as "stripling," and "young man."  Neither of these designations was appropriate for a man who had just tried on the armor of Israel's king Saul, who was something of a giant himself.