But if the bright spot stay. — As the spreading of the spot is a sure sign of the disease lurking in the system, its continuing in the same condition showed that it was simply the re-opening of the boil. The priest is therefore to pronounce the patient clean, or clear of leprosy.
Related Commentaries of Leviticus 13:23
Leviticus 13:23
23 But if the bright spot stay in his place, and spread not, it is a burning boil; and the priest shall pronounce him clean.