'Unclean' in the Bible

Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,

And that when I come again, my God may put me to shame among you, and I may have grief for those who have done wrong before and have had no regret for their unclean ways, and for the evil desires of the flesh to which they have given way.