Mark 9:49-50
For everyone will be salted with fire. [Note: This meant either the suffering "salt" of fiery trials (the sacrifices of verses 43-47 or the punishing "salt" of being thrown into a fiery hell (verse 45-48)].
Colossians 4:6
Your speech should always be favorable, seasoned with salt [i.e., interesting and appropriate], so that you may know how to properly answer each person [you talk with].
Matthew 5:13
"You people are [like] salt on the earth. But if salt loses its flavoring ability, how will it ever get it back again? From then on it would be good for nothing except to be thrown out onto the roadway and walked on by people. [Note: This was mined salt which, when losing its "saltiness" due to exposure to the sun or rain, was simply disposed of by being dumped onto the roadway where people walked].