'Be Clean' in the Bible

He is to purify himself on the third day and he will be clean on the seventh day. But if he can't purify himself on the third day then he can't be clean on the seventh day.

or anything else that can survive a refiner's fire: You are to pass it through fire, after which it will be clean. Then it is to be purified with the water of impurity. Everything that cannot survive a refiner's fire is to be washed in water.

Wash your clothes on the seventh day, after which you will be clean. Then you may enter the camp."