the priest must examine it. If the hair in the spot has turned white and the spot appears to be deeper than the skin, it is a disease that has broken out in the burn. The priest must pronounce him unclean; it is a diseased infection.
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 it,.... And examine it, whether it has the marks and signs of a leprosy or not, such as follow: behold, if the hair in the bright spot be turned white; which before was black, or of another colour from white, and is now, turned into the whiteness of chalk, as the Targum of Jonathan: and it be in sight...
Lev 13:2-28 The symptoms of leprosy, whether proceeding directly from eruptions in the skin, or caused by a boil or burn. - Lev 13:2-8. The first case: “When a man shall have in the skin of his flesh (body) a raised spot or scab, or a bright spot.” שׂאת, a lifting up (Gen 4:7, etc.), signifies here an elevation of the skin in some part...
Commenting on Leviticus 13:2-28