Leviticus 13:55
And the priest shall look on the sore after the washing, and behold, if the sore have not changed its appearance, and the sore have not spread, it is unclean: thou shalt burn it with fire: it is a fretting sore on what is threadbare or where the nap is gone.
Ezekiel 24:13
In thy filthiness is lewdness, for I have purged thee, and thou art not pure. Thou shalt no more be purged from thy filthiness, till I have satisfied my fury upon thee.
Hebrews 6:4-8
For it is impossible to renew again to repentance those once enlightened, and who have tasted of the heavenly gift, and have been made partakers of the Holy Spirit,
2 Peter 1:9
for he with whom these things are not present is blind, short-sighted, and has forgotten the purging of his former sins.
2 Peter 2:20-22
For if after having escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, again entangled, they are subdued by these, their last state is worse than the first.