'Salt' in the Bible

All the lifted offerings of the holy things which the children of Israel give to the Lord, I have given to you and to your sons and to your daughters as a right for ever. This is an agreement made with salt before the Lord, to you and to your seed for ever.

Then your south quarter will be from the waste land of Zin by the side of Edom, and your limit on the south will be from the east end of the Salt Sea,

And so down to Jordan, stretching to the Salt Sea: all the land inside these limits will be yours.