Leviticus 14:34-38

34“When you enter the land of Canaan, which I am giving you as your possession, and I put a spreading mold in a house in that land,

35the owner of the house must go and tell the priest, ‘I have seen something that looks like a defiling mold in my house.’

36The priest is to order the house to be emptied before he goes in to examine the mold, so that nothing in the house will be pronounced unclean. After this the priest is to go in and inspect the house.

37He is to examine the mold on the walls, and if it has greenish or reddish depressions that appear to be deeper than the surface of the wall,

38the priest shall go out the doorway of the house and close it up for seven days.