the salt
Leviticus 2:13
You shall season all your cereal offerings with salt; you shall not let the salt of the covenant with your God be lacking from your cereal offering; with all your offerings you shall offer salt.
Colossians 4:6
Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer every one.
if
Mark 9:49
Mark 9:50
Luke 14:34
"Salt is good; but if salt has lost its taste, how shall its saltness be restored?
Luke 14:35
It is fit neither for the land nor for the dunghill; men throw it away. He who has ears to hear, let him hear."
Hebrews 6:4-6
4
For it is impossible to restore again to repentance those who have once been enlightened, who have tasted the heavenly gift, and have become partakers of the Holy Spirit,
5
and have tasted the goodness of the word of God and the powers of the age to come,
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if they then commit apostasy, since they crucify the Son of God on their own account and hold him up to contempt.
2 Peter 2:20
For if, after they have escaped the defilements of the world through the knowledge of our Lord and Savior Jesus Christ, they are again entangled in them and overpowered, the last state has become worse for them than the first.
2 Peter 2:21
For it would have been better for them never to have known the way of righteousness than after knowing it to turn back from the holy commandment delivered to them.