1 Samuel 24:20-21 New International Reader's Version (NIRV)

20. I know for sure that you will be king. I know that the kingdom of Israel will be made secure under your control.

21. Now take an oath in the name of the Lord. Promise me that you won't cut off my children from my family. Also promise me that you won't wipe out my name from my family line."

1 Samuel 24