Scall - As this is the name for another disease not allied to the leprosy, it would have been better to retain the original word נתק netheq. It is a true elephantiasis, and is recognized by modern writers under the name of the Fox mange.

Then the priest shall see the plague,.... The person on whom it is shall come or be brought unto him; and he shall look upon it and examine it:

and, behold, if it be in sight deeper than the skin; which is always one sign of leprosy:

and there be in it a yellow thin hair; like the appearance of thin gold, as the Targum of Jonathan; for, as Ben Gersom says, its colour is the colour of gold; and it is called thin in this place, because short and soft, and not when it is long and small; and so it is said, scabs make unclean in two weeks, and by two signs, by thin yellow hair, and by spreading, by yellow hair, small, soft, and short (t): now this is to be understood, not of hair that is naturally of a yellow or gold colour, as is the hair of the head and beard of some persons, but of hair changed into this colour through the force of the disease; and so Jarchi interprets it, black hair turned yellow; in other parts of the body, hair turned white was a sign of leprosy, but here that which was turned yellow or golden coloured: Aben Ezra observes, that the colour expressed by this word is, in the Ishmaelitish or Arabic language, the next to the white colour:

then the priest shall pronounce him unclean; declare him a leper, and unfit for company, and order him to do and have done for him the things after expressed, as required in such a case:

it is a dry scall; or "wound", as the Septuagint version; "nethek", which is the word here used, Jarchi says, is the name of a plague that is in the place of hair, or where that grows; it has its name from plucking up; for there the hair is plucked away, as Aben Ezra and Ben Gersom note:

even a leprosy upon the head or beard; as the head is the seat of knowledge, and the beard a sign of manhood, and of a man's being arrived to years of discretion; when wisdom and prudence are expected in him; this sort of leprosy may be an emblem of errors in judgment, of false doctrines and heresies imbibed by persons, which eat as doth a canker, and are in themselves damnable, and bring ruin and destruction on teachers and hearers, unless recovered from them by the grace of God.

(t) Negaim, c. 10. sect. 1.

Then the priest shall see the plague: and, behold, if it be in sight deeper than the skin; and there be in it a yellow thin {i} hair; then the priest shall pronounce him unclean: it is a dry scall, even a leprosy upon the head or beard.

(i) Which was not wont to be there, or else smaller than in any other part of the body.

13:30 A yellow, thin hair - The leprosy in the body turned the hair white, in the head or beard it turned it yellow. And if a man's hair was yellow before, this might easily be distinguished from the rest, either by the thinness or smallness of it, or by its peculiar kind of yellow, for there are divers kinds of the same colour manifestly differing from one another.

13:18-44 The priest is told what judgment to make, if there were any appearance of a leprosy in old sores; and such is the danger of those who having escaped the pollutions of the world are again entangled therein. Or, in a burn by accident, ver. 24. The burning of strife and contention often occasions the rising and breaking out of that corruption, which proves that men are unclean. Human life lies exposed to many grievances. With what troops of diseases are we beset on every side; and thy all entered by sin! If the constitution be healthy, and the body lively and easy, we are bound to glorify God with our bodies. Particular note was taken of the leprosy, if in the head. If the leprosy of sin has seized the head; if the judgment be corrupted, and wicked principles, which support wicked practices, are embraced, it is utter uncleanness, from which few are cleansed. Soundness in the faith keeps leprosy from the head.