(30) Behold, if it be in sight deeper.--Better, Behold, if its appearance is deeper. The first symptom of its existence is the same as usual--the depression of the affected spot.

And there be in it a yellow thin hair.--Whilst the symptom of leprosy in other parts of the body consisted of the hair turning white on the affected spot, in the case of this distemper breaking out on the head or chin it was indicated by the naturally black hair changing its colour into a golden appearance, and becoming short. According to the administrators of the law during the second Temple, the colour of the hair became like that of the new plumage of young pigeons after they have lost their first feathers, or, in other words, like the appearance of thin gold. By the "thin hair" those authorities who came in contact with the disorder understand small or short hair. Hence they laid down the following rule: The condition of the hair constituting one of the signs of leprosy is its becoming short; but if it be long, though it is as yellow as gold, it is no sign of uncleanness. Two yellow and short hairs, whether close to one another or far from each other, whether in the centre of the affected spot or on the edge thereof,--no matter whether the affection on the spot precedes the yellow hair, or the yellow hair precedes the affection on the spot,--are symptoms of uncleanness.

It is a dry scall, even a leprosy.--The ancient canons laid down by those authorities in the time of Christ who had the official treatment of this distemper define the word (nethek), which is translated "dry scall" by an affection on the head or chin, which causes the hair on those affected parts to fall off by the roots, so that the place of the hair is quite bare.

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.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.