Whose son ... - See the marginal reference note.

And when Saul saw David go forth against the Philistine,.... Set out to meet him, and engage with him, as he might from the side of the mountain, where he was encamped:

he said unto Abner, the captain of the host; his own cousin, whom he had raised to this high post in the army, 1 Samuel 14:50,

Abner, whose son is this youth? it is thought strange by many that Saul should not know who he was, when he had been often at his court, and served him as a musician, and had been very useful to him, and he loved him, and made him his armourbearer, and even had just now conversed with him about encountering with the Philistine, and had clothed him with his own armour: to get rid of the former part of the objection, some have supposed that this event happened before David was his musician and armourbearer, and is by anticipation spoken of in 1 Samuel 16:14, but that the connection with this and the following chapter will not admit of; and besides, before this event, David is said to return home from Saul, 1 Samuel 17:15; so that it is certain he had been at Saul's court, and in his presence before: but to remove this seeming difficulty it may be observed, that Saul, having laboured under a disorder of body and mind, might easily forget David, and his serving him in the above capacity; and to which the multiplicity of business, and of persons in a court, might greatly contribute; and what with the distance of time, and the different habits in which David appeared, sometimes as a musician, and sometimes as a shepherd, and at other times as a soldier, and always as a servant, it is no wonder the king should not know him again; though after all it is not about his person that he inquires, but whose son he was, what was his father's name, and from what family he sprung; for though Saul was made acquainted with this in the time of his disorder, and therefore sent to his father Jesse for him, and afterwards desired leave for his continuance; yet this might slip out of his memory in a course of time, he having had no personal knowledge of Jesse, nor any correspondence with him, but just at that time; and it behoved him to know the pedigree of David, since, if he was victorious, he was not only to be enriched by him, but to have his daughter for wife, and his family ennobled:

and Abner said, as thy soul liveth, O king, I cannot tell; he swore by the life of Saul, as Joseph by the life of Pharaoh, that he knew nothing of him; which need not at all seem strange, that a general of an army, always employed in military affairs, and often abroad, should know nothing of a domestic servant of Saul's, under the character of a musician, and not always at court either; and still less that he should be ignorant of his family, and know nothing of his father, who lived in obscurity in Bethlehem, and was an old man in those days.

Jonathan's friendship. - 1 Samuel 17:55-58. The account of the relation into which David was brought to Saul through the defeat of Goliath is introduced by a supplementary remark, in 1 Samuel 17:55, 1 Samuel 17:56, as to a conversation which took place between Saul and his commander-in-chief Abner concerning David, whilst he was fighting with the giant. So far, therefore, as the actual meaning is concerned, the verbs in 1 Samuel 17:55 and 1 Samuel 17:56 should be rendered as pluperfects. When Saul saw the youth walk boldly up to meet the Philistine, he asked Abner whose son he was; whereupon Abner assured him with an oath that he did not know. In our remarks concerning the integrity of this section we have already observed, with regard to the meaning of the question put by Saul, that it does not presuppose an actual want of acquaintance with the person of David and the name of his father, but only ignorance of the social condition of David's family, with which both Abner and Saul may hitherto have failed to make themselves more fully acquainted.

(Note: The common solutions of this apparent discrepancy, such as that Saul pretended not to know David, or that his question is to be explained on the supposition that his disease affected his memory, have but little probability in them, although Karkar still adheres to them.)

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

(e) That is, of what family and tribe is he? He had forgotten David, even though he had received so great a benefit by him.

17:55 Whose son - David had been some considerable time dismissed from Saul's court, and was returned home. And therefore it is not strange, if Saul for the present had forgot David. Besides the distemper of Saul's mind might make him forgetful; and that David might be now much changed, both in his countenance and in his habit. I cannot tell - Abner's employment was generally in the camp, when David was at the court; and when Abner was there, he took little notice of a person so much inferior to him as David was.

55-58. Saul . said unto Abner . whose son is this youth?-A young man is more spoken of in many Eastern countries by his father's name than his own. The growth of the beard, and other changes on a now full-grown youth, prevented the king from recognizing his former favorite minstrel [1Sa 16:23].

17:48-58 See how frail and uncertain life is, even when a man thinks himself best fortified; how quickly, how easily, and by how small a matter, the passage may be opened for life to go out, and death to enter! Let not the strong man glory in his strength, nor the armed man in his armour. God resists the proud, and pours contempt on those who defy him and his people. No one ever hardened his heart against God and prospered. The history is recorded, that all may exert themselves for the honour of God, and the support of his cause, with bold and unshaken reliance on him. There is one conflict in which all the followers of the Lamb are, and must be engaged; one enemy, more formidable than Goliath, still challenges the armies of Israel. But resist the devil, and he will flee from you. Go forth to battle with the faith of David, and the powers of darkness shall not stand against you. But how often is the Christian foiled through an evil heart of unbelief!