1 Samuel 2:30

2:30 Therefore the Lord, the God of Israel, says, ‘I really did say that your house and your ancestor’s house would serve me forever.’ But now the Lord says, ‘May it never be! For I will honor those who honor me, but those who despise me will be cursed!

1 Samuel 20:42

20:42 Jonathan said to David, “Go in peace, for the two of us have sworn together in the name of the Lord saying, ‘The Lord will be between me and you and between my descendants and your descendants forever.’”

(21:1)

Then David got up and left, while Jonathan went back to the city.