Leviticus 13:55
Then the priest is to examine it after the contagion has been washed. If the contagion hasn't changed in appearance, even though the contagion hasn't spread, it's unclean. Incinerate it. It's a fungal infection, especially if the infection is on its exposed side.
Ezekiel 24:13
There is wickedness in your obscene conduct. Even though I've cleansed you, you uncleanness cannot be washed away. You cannot be cleansed again until my rage against you has subsided.'
Hebrews 6:4-8
For it is impossible to keep on restoring to repentance time and again people who have once been enlightened, who have tasted the heavenly gift, who have become partners with the Holy Spirit,
2 Peter 1:9
For the person who lacks these qualities is blind and shortsighted, and has forgotten the cleansing that he has received from his past sins.
2 Peter 2:20-22
For if, after escaping the world's corruptions through a full knowledge of our Lord and Savior Jesus, the Messiah, they are again entangled and conquered by those corruptions, then their last condition is worse than their former one.