Matthew 5:13

Ye are the salt of the earth: but if the salt hath lost its savor, with what shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot by men.

Leviticus 2:13

And every oblation of thy meat-offering shalt thou season with salt: neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meat-offering: with all thy offerings thou shalt offer salt.

Luke 14:34-35

Salt is good: but if the salt hath lost its savor, with what shall it be seasoned?

Colossians 4:6

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

Mark 9:49-50

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

Hebrews 6:4-6

For it is impossible for those who have been once enlightened, and have tasted the heavenly gift, and have been made partakers of the Holy Spirit.

2 Peter 2:20-21

For if after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them, and overcome, the latter end is worse with them than the beginning.

Treasury of Scripture Knowledge

Summary

Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.

General references

Bible References

The salt

Leviticus 2:13
And every oblation of thy meat-offering shalt thou season with salt: neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meat-offering: with all thy offerings thou shalt offer salt.
Colossians 4:6
Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every man.

If

Mark 9:49
For every one shall be salted with fire, and every sacrifice shall be salted with salt.
Luke 14:34
Salt is good: but if the salt hath lost its savor, with what shall it be seasoned?
Hebrews 6:4
For it is impossible for those who have been once enlightened, and have tasted the heavenly gift, and have been made partakers of the Holy Spirit.
2 Peter 2:20
For if after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them, and overcome, the latter end is worse with them than the beginning.

General references

Ezekiel 15:3
Shall wood be taken of it to do any work? or will men take a pin of it to hang any vessel upon it?