Matthew 5:13
You are the salt of the earth: but if the salt have lost his flavor, with which shall it be salted? it is thereafter good for nothing, but to be cast out, and to be trodden under foot of men.
Torrey's Topical Textbook—AKJV

Mark 9:50
Salt is good: but if the salt have lost his saltiness, with which will you season it? Have salt in yourselves, and have peace one with another.
Torrey's Topical Textbook—AKJV