18 And thou hast shewed this day how that thou hast dealt well with me: forasmuch as when the Lord had delivered  me into thine hand, thou killedst me not.
18 You have just now told me about the good you did to me; the Lord delivered me into your hands, but you did not kill me.
18 And you have declared this day how you have dealt well with me, in that you did not kill me when the Lord put me into your hands.
18 And now you've done it again - treated me generously. God put me in your hands and you didn't kill me.
18 And you have shown this day how you have dealt well with me; for when the Lord delivered me into your hand, you did not kill me.
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.
Matthew Henry's Commentary on 1 Samuel 24:18
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.