Luke 14:34

“Therefore, salt is good; but if even salt has become tasteless, with what will it be seasoned?

Matthew 5:13

“You are the salt of the earth; but if the salt has become tasteless, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled under foot by men.

Mark 9:49-50

“For everyone will be salted with fire.

Colossians 4:6

Let your speech always be with grace, as though seasoned with salt, so that you will know how you should respond to each person.

Hebrews 2:4-8

God also testifying with them, both by signs and wonders and by various miracles and by gifts of the Holy Spirit according to His own will.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

But

Matthew 5:13
“You are the salt of the earth; but if the salt has become tasteless, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled under foot by men.
Mark 9:49
“For everyone will be salted with fire.
Colossians 4:6
Let your speech always be with grace, as though seasoned with salt, so that you will know how you should respond to each person.
Hebrews 2:4
God also testifying with them, both by signs and wonders and by various miracles and by gifts of the Holy Spirit according to His own will.

General references

Ezekiel 15:3
Can wood be taken from it to make anything, or can men take a peg from it on which to hang any vessel?