Most Relevant Verses
Come now, and let us reason together, says the Lord. Though your sins are like scarlet, they shall be as white as snow; though they are red like crimson, they shall be like wool.
He who is to be cleansed shall wash his clothes, shave off all his hair, and bathe himself in water; and he shall be clean. After that he shall come into the camp, but stay outside his tent seven days.
Blessed (happy and to be envied) are those who cleanse their garments, that they may have the authority and right to [approach] the tree of life and to enter through the gates into the city.