The healing is ascribed to God, Leviticus 14:13, but the ceremonial cleansing or making of him clean and fit for society was an act of the priest using the rites which God had prescribed, whereby the sinner was cleansed.
Related Commentaries of Leviticus 14:11
Leviticus 14:11
11 And the priest that maketh him clean shall present the man that is to be made clean, and those things, before the LORD, at the door of the tabernacle of the congregation: