Leviticus 14:34-38

34When ye are come into the land of Canaan, which I give to you for a possession, and I put the plague of leprosy in a house of the land of your possession; 35then he that owneth the house shall come and tell the priest, saying, There seemeth to me to be as it were a plague in the house. 36And the priest shall command that they empty the house, before the priest goeth in to see the plague, that all that is in the house be not made unclean: and afterward the priest shall go in to see the house: 37and he shall look on the plague; and, behold, if the plague be in the walls of the house with hollow streaks, greenish or reddish, and the appearance thereof be lower than the wall; 38then the priest shall go out of the house to the door of the house, and shut up the house seven days.