Leviticus 14:48

If the priest should find, however, that after the fresh plastering the mole had not appeared again, or spread (to other places), he was to pronounce the house clean, because the evil was cured, and (Lev 14:49-53) to perform the same rite of purification as was prescribed for the restoration of a man, who had been cured of leprosy, to the national community (Lev 14:4-7). The purpose was also the same, namely, to cleanse (חטּא cleanse from sin) and make atonement for the house, i.e., to purify it from the uncleanness of sin which had appeared in the leprosy. For, although it is primarily in the human body that sin manifests itself, it spreads from man to the things which he touches, uses, inhabits, though without our being able to represent this spread as a physical contagion.

The former chapter directed the priests how to convict a leper of ceremonial uncleanness. No prescriptions are given for his cure; but, when God had cured him, the priests are in this chapter directed how to cleanse him. The remedy here is only adapted to the ceremonial part of his disease; but the authority Christ gave to his ministers was to cure the lepers, and so to cleanse them. We have here, I. The solemn declaration of the leper's being clean, with the significant ceremony attending it (Lev 14:1-9). II. The sacrifices which he was to offer to God eight days after (v. 10-32). III. The management of a house in which appeared signs of a leprosy (v. 33-53). And the conclusion and summary of this whole matter (Lev 14:54, etc.).