Leviticus

³⁸then the priest shall go out of the house to the door of the house, and shut up the house seven days: ³⁹and the priest shall come again the seventh day, and shall look: and, behold, if the plague be spread in the walls of the house; ⁴⁰then the priest shall command that they take out the stones in which the plague is, and cast them into an unclean place without the city: ⁴¹and he shall cause the house to be scraped within round about, and they shall pour out the mortar that they scrape off without 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 plaister the house. ⁴³And if the plague come again, and break out in the house, after that he hath taken out the stones, and after he hath scraped the house, and after it is plaistered; ⁴⁴then the priest shall come in and look, and, behold, if the plague be spread in the house, it is a fretting leprosy in the house: it is unclean.