1 Samuel 24:16-22

16And it came to pass, when David had made an end of speaking these words unto Saul, that Saul said, Is this thy voice, my son David? And Saul lifted up his voice, and wept. 17And he said to David, Thou art more righteous than I: for thou hast rendered unto me good, whereas I have rendered unto thee evil. 18And thou hast declared this day how that thou hast dealt well with me: forasmuch as when the LORD had delivered me up into thine hand, thou killedst me not. 19For if a man find his enemy, will he let him go well away? wherefore the LORD reward thee good for that thou hast done unto me this day. 20And now, behold, I know that thou shalt surely be king, and that the kingdom of Israel shall be established in thine hand. 21Swear now therefore unto me by the LORD, that thou wilt not cut off my seed after me, and that thou wilt not destroy my name out of my father’s house. 22And David sware unto Saul. And Saul went home; but David and his men gat them up unto the hold.