'Be Clean' in the Bible

Thus saith the LORD God: Wash and be clean; put away the wickedness of your imaginations out of my sight. Cease to do evil and learn to do well.

The hatred of Ephraim and the enmity of Judah shall be clean rooted out. Ephraim shall bear no evil will to Judah, and Judah shall not hate Ephraim:

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].