Leviticus 14:31-35

He shall offer what he can afford, the one as a sin offering and the other as a burnt offering, together with the grain offering. So the priest shall make atonement before the Lord on behalf of the one to be cleansed.

This is the law for him in whom there is an infection of leprosy, whose means are limited for his cleansing.” Cleansing a Leprous House

The Lord further spoke to Moses and to Aaron, saying:

“When you enter the land of Canaan, which I am giving you as a possession, and I put a spot of leprosy on a house in the land of your possession,

then the one who owns the house shall come and tell the priest, saying, ‘Something like a spot of leprosy has become visible to me in the house.’