Leviticus 14:37-41

And he shall look on the plague, and, behold, if the plague be in the walls of the house with hollow strakes, greenish or reddish, which in sight are lower than the wall;

Then the priest shall go out of the house to the door of the house, and shut up the house seven days:

And the priest shall come again the seventh day, and shall look: and, behold, if the plague be spread in the walls of the house;

Then the priest shall command that they take away the stones in which the plague is, and they shall cast them into an unclean place without the city:

And he shall cause the house to be scraped within round about, and they shall pour out the dust that they scrape off without the city into an unclean place: