Leviticus 13:55
And the priest hath seen that which hath the plague after it hath been washed, and lo, the plague hath not changed its aspect, and the plague hath not spread, -- it is unclean; with fire thou dost burn it; it is a fretting in its back-part or in its front-part.
Ezekiel 24:13
In thine uncleanness is wickedness, Because I have cleansed thee, And thou hast not been cleansed, From thine uncleanness thou art not cleansed again, Till I have caused My fury to rest on thee.
Hebrews 6:4-8
for it is impossible for those once enlightened, having tasted also of the heavenly gift, and partakers having became of the Holy Spirit,
2 Peter 1:9
for he with whom these things are not present is blind, dim-sighted, having become forgetful of the cleansing of his old sins;
2 Peter 2:20-22
for, if having escaped from the pollutions of the world, in the acknowledging of the Lord and Saviour Jesus Christ, and by these again being entangled, they have been overcome, become to them hath the last things worse than the first,