And as David returned from the slaughter of the Philistine,.... Carrying his head in triumph, and no doubt accompanied with the acclamations of the people:

Abner took him and brought him before Saul, with the head of the Philistine in his hand; to give an answer to the king's question concerning him, who could best do it himself; and that Saul might have the opportunity of rewarding him, according to his merit, for so great a piece of service he had done for Israel, of which the head in his hand was a sufficient proof.

When David returned "from the slaughter of the Philistine," i.e., after the defeat of Goliath, and when Abner, who probably went as commander to meet the brave hero and congratulate him upon his victory, had brought him to Saul, the king addressed the same question to David, who immediately gave him the information he desired. For it is evident that David said more than is here communicated, viz., "the son of thy servant Jesse the Bethlehemite," as we have already observed, from the words of 1 Samuel 18:1, which presuppose a protracted conversation between Saul and David. The only reason, in all probability, why this conversation has not been recorded, is that it was not followed by any lasting results either for Jesse or David.

And as David returned from the slaughter of the Philistine, Abner took him, and brought him before Saul with the head of the Philistine in his hand.

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!