1 Samuel 24:16-22

When David had finished saying these words to Saul, Saul said, “Is this your voice, my son David?” Then Saul raised his voice and wept. He said to David, “You are more righteous and upright [in God’s eyes] than I; for you have done good to me, but I have done evil to you. You have declared today the good that you have done to me, for when the LORD put me into your hand, you did not kill me. For if a man finds his enemy, will he let him go away unharmed? So may the LORD reward you with good in return for what you have done for me this day. Now, behold, I know that you will certainly be king and that the kingdom of Israel will be established in your hand. So now swear to me by the LORD that you will not cut off my descendants after me and that you will not destroy my name from my father’s household (extended family).” David gave Saul his oath; and Saul went home, but David and his men went up to the mountain stronghold.