2 Chronicles 13:4-5

Then Abijah stood on Mount Zemaraim, which is in the hill country of Ephraim, and said, “Listen to me, Jeroboam and all Israel: Do you not know that the LORD God of Israel, gave rule over Israel forever to David and to his sons by a covenant of salt [a permanent pact, extending to each generation of Israel]? [Num 18:19]