Leviticus 14:40-45

40then the kohen is to command that they take out the stones which are marked and throw them into an unclean place outside of the city.

41He shall also have the inside of the house scraped all throughout, and they are to dump the mortar that they scraped off outside of the city into an unclean place.

42They may then take other stones and put them in the place of those stones. Likewise he can take other mortar, and plaster the house.

43“But suppose the contamination returns, breaking out in the house, after he has pulled out the stones and after he has scraped the house, and it has been re-plastered.

44Then the kohen is to go examine, and behold, if the plague has spread within the house, it is a destructive mildew inside. It is unclean.

45He is to break down the house, its stones, its timber, along with all the house’s mortar, and carry them out of the city into an unclean place.