Leviticus 14:40-42

40then the priest shall command that they take away the stones in which is the plague, and they shall cast them into an unclean place outside the city.

41And he shall cause the house to be scraped inside, all around, and the dust that they scrape off they shall pour out in an unclean place outside the city.

42Then they shall take other stones and put them in the place of those stones, and he shall take other mortar and plaster the house.