"You are the salt of the earth; but if the salt loses its flavor, how shall it be seasoned? It is then good for nothing but to be thrown out and trampled underfoot by men.
Matthew 5:13
Salt [is] good, but if the salt loses its flavor, how will you season it? Have salt in yourselves, and have peace with one another."
Mark 9:50
[Let] your speech always [be] with grace, seasoned with salt, that you may know how you ought to answer each one.
Colossians 4:6
Can a fig tree, my brethren, bear olives, or a grapevine bear figs? Thus no spring yields both salt water and fresh.
James 3:12