If, however, in his sight the scaly outbreak is unchanged and black hair has grown in it, then it has healed. He is clean, and the priest is to pronounce him clean.
The priest is here instructed what judgment to make if there was any appearance of a leprosy, either, 1. In an old ulcer, or bile, that has been healed, Lev 13:18, etc. When old sores, that seemed to be cured, break out again, it is to be feared there is a leprosy in them; such is the danger of those who, having escaped the pollutions...
Commenting on Leviticus 13:18-37
Then the priest shall look,.... Upon the man or woman that has these spots, and upon the spots themselves, and examine them of what kind they are: and, behold, if the bright spots in the skin of their flesh be darkish white; their whiteness is not strong, as Jarchi observes; but dusky and obscure, or "contracted" (w); small white spots, not large and spreading: it...
Lev 13:37 But if, on the contrary, the eruption stood (see Lev 13:5), and black hair grew out of it, he was healed, and the person affected was to be declared clean.