Leviticus 14:53

but he shall let go the living bird out of the city into the open fields, and make an atonement for the house, as a structure infected with the uncleanness of sin, as it appeared in the fungous growth on the walls; and it shall be clean. The rite thus was exactly the same as that used for the leper without the camp, vv. 4-7, and the house was restored from its taint to its proper relations and purposes.