Leviticus 14:40-42

40the priest shall order them to pull out the stones with the spot on them and throw them away 1at an unclean place outside the city. 41And he shall have the house scraped all around 2inside, and they shall dump the plaster that they scrape off at an unclean place outside the city. 42Then they shall take other stones and replace the discarded stones, and he shall take other plaster and replaster the house.