Leviticus 14:34-38

34“When you have come into the land of Canaan, which I give you as a possession, and I put the leprous plague in a house in the land of your possession,

35and he who owns the house comes and tells the priest, saying, ‘It seems to me that there is some plague in the house,’

36then the priest shall command that they empty the house, before the priest goes into it to examine the plague, that all that is in the house may not be made unclean; and afterward the priest shall go in to examine the house.

37And he shall examine the plague; and indeed if the plague is on the walls of the house with ingrained streaks, greenish or reddish, which appear to be deep in the wall,

38then the priest shall go out of the house, to the door of the house, and shut up the house seven days.