Bible Verses About Salt: Used in ratifying covenants

All the wave offerings of the holy things, which the children of Israel offer to the LORD, have I given you, and your sons and your daughters with you, as a portion forever. It is a covenant of salt forever before the LORD to you and to your seed with you.”

Ought you not to know that the LORD, the God of Israel, gave the kingdom over Israel to David forever, even to him and to his sons by a covenant of salt?