Luke 14:34

Salt, therefore, is good; but if even the salt become tasteless, with what shall it be seasoned?

Matthew 5:13

"Ye are the salt of the earth; but, if the salt become tasteless, with what shall it be salted? It is henceforth good for nothing, except, when cast without, to be trodden under foot by men.

Mark 9:49-50

For every one shall be salted with fire.

Colossians 4:6

Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer each one.

Hebrews 2:4-8

God testifying with them, both with signs and wonders and manifold miracles, and distributions of the Holy Spirit, according to His will?

Treasury of Scripture Knowledge

Summary

Salt is good: but if the salt have lost his savour, wherewith shall it be seasoned?

Bible References

But

Matthew 5:13
"Ye are the salt of the earth; but, if the salt become tasteless, with what shall it be salted? It is henceforth good for nothing, except, when cast without, to be trodden under foot by men.
Mark 9:49
For every one shall be salted with fire.
Colossians 4:6
Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer each one.
Hebrews 2:4
God testifying with them, both with signs and wonders and manifold miracles, and distributions of the Holy Spirit, according to His will?