New King James Version

1 Samuel 24:20-22 New King James Version (NKJV)

20. And now I know indeed that you shall surely be king, and that the kingdom of Israel shall be established in your hand.

21. Therefore swear now 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 house.”

22. So David swore to Saul. And Saul went home, but David and his men went up to the stronghold.