'Salt' in the Bible

All the offerings of the holy things, which the Israelites offer to the Lord I have given to you and to your sons and your daughters with you as a continual allotment. It is an everlasting covenant of salt [that cannot be dissolved or violated] before the Lord to you and to your descendants with you.”

your southern region shall be from the Wilderness of Zin along the side of Edom, and your southern boundary from the end of the Salt (Dead) Sea eastward.

and the [eastern] boundary shall go down to the Jordan [River], and its limit shall be at the Salt (Dead) Sea. This shall be your land according to its boundaries all around.’”