I will — Having doubtless consulted God in the matter; who as he had before declared Saul's bloody house to be the causes of this judgment, so now commanded that justice should be done upon it, and that the remaining branches of it should be cut off; as sufficiently appears from hence, that God was well pleased with the action; which he would not have been, if David had done it without his command; for then it had been a sinful action of David's, and contrary to a double law of God, Deuteronomy 21:23, Deuteronomy 24:16.
Related Commentaries of 2 Samuel 21:6
2 Samuel 21:6
6 Let seven men of his sons be delivered unto us, and we will hang them up unto the LORD in Gibeah of Saul, whom the LORD did choose. And the king said, I will give them.