1 Samuel 24:20 YLT

¹⁸  and thou hast declared to-day how that thou hast done good with me, how that Jehovah shut me up into thy hand, and thou didst not slay me,

¹⁹  and that a man doth find his enemy, and hath sent him away in a good manner; and Jehovah doth repay thee good for that which thou didst to me this day.

²⁰  'And, now, lo, I have known that thou dost certainly reign, and the kingdom of Israel hath stood in thy hand;

²¹  and, now, swear to me by Jehovah -- thou dost not cut off my seed after me, nor dost thou destroy my name from the house of my father.'

²²  And David sweareth to Saul, and Saul goeth unto his house, and David and his men have gone up unto the fortress.