Leviticus 13:36

Then the priest shall look on him ,.... Again, and which is no less than the fourth time; for notwithstanding his being pronounced clean, he was still subject to the inspection of the priest, if any alteration appeared:

and, behold, if the scall be spread in the skin ; which was a certain sign of a leprosy:

the priest shall not seek for yellow hair ; or be solicitous about that, whether there is any or not, for either one or the other of these signs were sufficient to determine the case:

he is unclean ; and so to be pronounced.