See also Example
you are salt of earth, 3 Ne. 12:13 (Matt. 5:13).
Gentiles shall be as salt that has lost savor, 3 Ne. 16:15.
when men covenant with everlasting covenant, they are accounted as salt of earth, D&C 101:39–40.
if Saints are not saviors of men, they are as salt that has lost savor, D&C 103:10.