David's words and actions convicted Saul of his actions (v. 17), and the king wept tears of remorse (v. 16). He referred to David as his "son"(v. 16), as David had earlier called Saul his "father"(v. 11). Saul confessed David's superior righteousness (v. 17) and goodness (v. 18). There is no more powerful tribute than one that comes from an adversary. Saul even called on the Lord to reward David with blessing for his treatment of the king (v. 19). Saul then confessed that he realized that David's ultimate succession to the throne of Israel was inevitable (v. 20; cf. 23:17).
Finally Saul asked David not to cut off his descendants when he came to power (v. 21). As noted earlier, it was customary in the ancient Near East for a new king to kill all the descendants of the ruler whom he replaced. This prevented them from rising up and reestablishing the dead king's dynasty. David had already promised Jonathan that he would not kill his descendants (20:14-17), and he now made the same promise to Saul (v. 22). To cut off someone's name meant to obliterate the memory of him. David even agreed to spare Saul's reputation in Israel (cf. 2 Sam. 2:17-27).
Saul's remorse was evidently genuine, but David had learned that it would probably be only temporary. Consequently when Saul departed and returned to Gibeah, David again sought protection in "the stronghold,"probably one of the refuges near Engedi (perhaps Masada? v. 22; cf. 23:29).
This chapter helps us to deal with the common temptation to get even by showing us David's example of trusting God and not retaliating. It also deals with how we should view securing what God has promised us. David let God determine how and when he would become king. He refused the temptation to take matters into his own hands and thereby determine his destiny. We see David growing in this chapter. He began by threatening the king, but then he backed off and declined to kill Saul. Finally he determined even to trust God to control Saul's descendants, as well as Saul himself, and to preserve Saul's memory in Israel. God rewarded David for his trust and obedience by giving him a peaceful conscience immediately and safety when his own son, Absalom, rose up against him.
