Leviticus 14:39-41

The Voice

³⁹ When the seventh day arrives, the priest will go back into the house and inspect it again. If the discolored spot has shown up on other places on the walls, ⁴⁰ the priest will direct them to remove all the stones that have any suspicious spots on them and discard them in the impure refuse pile outside the camp. ⁴¹ They are also to scrape off any suspicious-looking plaster and discard it in the impure refuse pile outside the camp.