Numbers 18:19

It is a covenant of salt. — i.e., an indissoluble covenant. (See Leviticus 2:13, and Note; also 2 Chronicles 13:5.) Hence the phrases used by the Greeks to denote the breach of a covenant, “Where is the salt?” and “They overstepped the salt.” (Comp. Pliny, H. N., xxxi. 41; Cic., De Div., ii. 16; Virgil, Ecl., viii. 82.)