16 When David had finished speaking, Saul called back, "Is that really you, my son David?" Then he began to cry. 17 And he said to David, "You are a better man than I am, for you have repaid me good for evil. 18 Yes, you have been amazingly kind to me today, for when the Lord put me in a place where you could have killed me, you didn't do it. 19 Who else would let his enemy get away when he had him in his power? May the Lord reward you well for the kindness you have shown me today. 20 And now I realize that you are surely going to be king, and that the kingdom of Israel will flourish under your rule. 21 Now swear to me by the Lord that when that happens you will not kill my family and destroy my line of descendants!" 22 So David promised this to Saul with an oath. Then Saul went home, but David and his men went back to their stronghold.
Matthew Henry's Commentary on 1 Samuel 24:16-22
Commentary on 1 Samuel 24:16-22
(Read 1 Samuel 24:16-22)
Saul speaks as quite overcome with David's kindness. Many mourn for their sins, who do not truly repent of them; weep bitterly for them, yet continue in love and in league with them. Now God made good to David that word on which he had caused him to hope, that he would bring forth his righteousness as the light, Psalm 37:6. Those who take care to keep a good conscience, may leave it to God to secure them the credit of it. Sooner or later, God will force even those who are of the synagogue of Satan to know and to own those whom he has loved. They parted in peace. Saul went home convinced, but not converted; ashamed of his envy to David, yet retaining in his breast that root of bitterness; vexed that when at last he had found David, he could not find in his heart to destroy him, as he had designed. Malice often seems dead when it is only asleep, and will revive with double force. Yet, whether the Lord bind men's hands, or affect their hearts, so that they do not hurt us, the deliverance is equally from him; it is an evidence of his love, and an earnest of our salvation, and should make us thankful.