Colossians 4:6

Let your conversation always be kindly, and seasoned, as it were, with salt; that you may know in each case what answer you ought to give.

Matthew 5:13

It is you who are the Salt of the earth; but, if the salt should lose its strength, what will you use to restore its saltiness? It is no longer good for anything, but is thrown away, and trampled underfoot.

Mark 9:49-50

For it is by fire that every one will be salted.

Treasury of Scripture Knowledge

Summary

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 thine offerings thou shalt offer salt.

Bible References

With salt

Matthew 5:13
It is you who are the Salt of the earth; but, if the salt should lose its strength, what will you use to restore its saltiness? It is no longer good for anything, but is thrown away, and trampled underfoot.
Mark 9:49
For it is by fire that every one will be salted.
Colossians 4:6
Let your conversation always be kindly, and seasoned, as it were, with salt; that you may know in each case what answer you ought to give.