'Unclean' in the Bible

Then I said,“Woe is me! For I am ruined,Because I am a man of [ceremonially] unclean lips,And I live among a people of unclean lips;For my eyes have seen the King, the Lord of hosts.”

A highway will be there, and a roadway;And it will be called the Holy Way.The unclean will not travel on it,But it will be for those who walk on the way [the redeemed];And fools will not wander on it.

Awake, awake,Put on your strength, O Zion;Put on your beautiful garments,O Jerusalem, the holy city;For the uncircumcised and the uncleanWill no longer come into you.

Depart, depart, go out from there (the lands of exile),Touch no unclean thing;Go out of the midst of her (Babylon), purify yourselves,You who carry the articles of the Lord [on your journey from there].

For we all have become like one who is [ceremonially] unclean [like a leper],And all our deeds of righteousness are like filthy rags;We all wither and decay like a leaf,And our wickedness [our sin, our injustice, our wrongdoing], like the wind, takes us away [carrying us far from God’s favor, toward destruction].