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.
Matthew 5:13 Cross References - Webster
Leviticus 2:13
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.
Mark 9:49-50
Luke 14:34-35
Colossians 4:6
6 Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every man.
Hebrews 6:4-6
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.
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again to repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
2 Peter 2:20-21
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.
21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered to them.