Hebrews 6:4-8
For it is not possible to renew again unto repentance those who have been once illuminated, and have tasted the celestial gift, and have been made partakers of the Holy Ghost,
2 Peter 2:20
For if having escaped from the defilements of the world by the knowledge of our Lord and Saviour Jesus Christ, they are again enveloped by them and overcome, their last deeds are worse than the first.
2 Peter 2:22
But the true proverb is verified in them, The dog hath returned to his own vomit; and the sow which was washed to its wallowing in the mire.
Jude 1:12
These are in your feasts of love, as sunken rocks; though joining in your banquet, they feed themselves fearlessly; clouds without water carried about by the winds; trees untimely withering, fruitless, twice dead, rooted up;