Exodus 30:35

RV 'and thou shalt make of it incense, a perfume after the art of the perfumer, seasoned with salt, pure and holy.' Salt, as preventing corruption, is the symbol of purity and durability; it was used with all sacrifices both animal and vegetable: see Leviticus 2:13; Ezra 6:9; Ezekiel 43:24; Mark 9:49. Among the Arabs salt is the emblem of fidelity and lasting friendship. To have 'eaten salt' with a person, and so partaken of his hospitality, is equivalent to a pledge of mutual and indissoluble amity. Hence in OT. a 'covenant of salt' is one that cannot be broken: see Leviticus 2:13; Numbers 18:19; 2 Chronicles 13:5, and cp. Ezra 4:14 (AM) and Mark 9:50.