1 Samuel 24:18-20

18And thou hast declared this day how that thou hast dealt well with me, forasmuch as when Jehovah had delivered me up into thy hand, thou killedst me not. 19For if a man find his enemy, will he let him go well away? wherefore Jehovah reward thee good for that which 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 thy hand.