Leviticus 14:40-45

40Then the priest shall command that they take away the stones in which the plague is, and they shall cast them into an unclean place outside the city: 41And he shall cause the house to be scraped within on all sides, and they shall pour out the dust that they scrape off outside the city into an unclean place: 42And they shall take other stones, and put them in the place of those stones; and he shall take other mortar, and shall plaster the house. 43And if the plague shall return, and break out in the house, after that he hath taken away the stones, and after he hath scraped the house, and after it is plastered; 44Then the priest shall come and look, and, behold, if the plague is spread in the house, it is a fretting leprosy in the house: it is unclean. 45And he shall break down the house, its stones, and its timber, and all the mortar of the house; and he shall carry them forth out of the city to an unclean place.