Hebrews 6:4-8
For it is impossible for those who have once been enlightened, who have tasted the heavenly gift, and have become partakers of the Holy Spirit,
2 Peter 2:20
For if, after they have escaped the defilements of the world by the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and are overcome, the last state has become worse for them than the first.
2 Peter 2:22
It has happened to them according to the true proverb, "A dog turns back to its own vomit," and, "A sow, after having washed, returns to wallowing in the mire."
Jude 1:12
These are the men who are blemishes in your love feasts when they feast with you without fear, caring for themselves; clouds without water, carried along by winds; autumn trees without fruit, twice dead, uprooted;