Hebrews 6:4-8
For it is impossible for those who have once for all been enlightened and have experienced the gift from heaven, who have been made sharers of the Holy Spirit
2 Peter 2:20
For if, after men have escaped the corrupting ways of the world through a full knowledge of the Lord and Saviour Jesus Christ, they again become entangled in them and are conquered by them, then their last condition is worse than their former one.
2 Peter 2:22
In them is verified the truth of the proverb, "A dog turns back to what he has vomited"; and of that other proverb, "A sow that has washed herself goes back to wallow in the mire."
Jude 1:12
They are blots on your love feasts while they feast with you, daringly caring for no one but themselves; rainless clouds swept along by winds; leafless trees that bear no fruit, doubly dead, uprooted;