Luke 14:34

Salt, therefore, is good; but if the salt has lost its strength, with what shall it be seasoned?

Matthew 5:13

You are the salt of the earth; but if the salt has lost its strength, with what shall it be seasoned? It is good for nothing more, except being cast out to be trodden upon by men.

Mark 9:49-50

For every man shall be salted with fire, and every sacrifice shall be salted with salt.

Colossians 4:6

Let your words always be with kindness, seasoned with salt, that you may know how to answer every one.

Hebrews 2:4-8

God bearing them witness with signs and prodigies, and various mighty works and gifts 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
You are the salt of the earth; but if the salt has lost its strength, with what shall it be seasoned? It is good for nothing more, except being cast out to be trodden upon by men.
Mark 9:49
For every man shall be salted with fire, and every sacrifice shall be salted with salt.
Colossians 4:6
Let your words always be with kindness, seasoned with salt, that you may know how to answer every one.
Hebrews 2:4
God bearing them witness with signs and prodigies, and various mighty works and gifts of the holy Spirit, according to his will.