1 Samuel 24:18-20

18And thou hast shewed this day how that thou hast dealt well with me, forasmuch as when Jehovah had delivered me up into thy hand, thou didst not kill me.

19For if a man find his enemy, will he let him go well away? wherefore Jehovah reward thee good for that thou hast done to me this day.

20And now behold, I know that thou shalt certainly be king, and that the kingdom of Israel shall be established in thy hand.