The "UNCLEAN" THING

Isaiah 52:11 (KJV): Depart ye, depart ye, go ye out from thence, touch no unclean thing; go ye out of the midst of her; be ye clean, that bear the vessels of the LORD.

2 Corinthians 6:17 (KJV): Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you.

Colossians 2:21-22 (KJV):

21. (Touch not; taste not; handle not;

22. Which all are to perish with the using;) after the commandments and doctrines of men?