(31) It be not in sight deeper than the skin.--Better, its appearance is not deeper than the other skin. If the first symptom which manifests itself in the depression of the affected spot is absent.

And that there is no black hair in it.--Better, but there is no black hair in it; that is, the healthy black colour of the hair is absent, which is a suspicious sign. The phrase, "there is no black hair in it," is another way of saying "there is yellow hair in it." The presence of yellow hair, however, on the first inspection, though suspicious, did not necessarily indicate by itself leprosy, since the hair sometimes turned yellow temporarily in the case of an ordinary ulcer, and resumed its natural black colour when the patient returned to his usual health. Hence, the absence of the black hair was simply a suspicious symptom, which required the attention of the priest, for which reason the patient had to be put in quarantine for seven days. The alteration of the word "black" into "yellow," which has been adopted by those commentators who follow the LXX.,is therefore unnecessary. Indeed, if this reading be adopted, both the unfavourable symptoms mentioned in Leviticus 13:30, which indicate leprosy--viz., (1) the depression of the affected spot, and (2) the discolouring of the hair--would be absent. There would be no reason for quarantine, as the priest in the absence of these criteria would have to pronounce the man clean. (See Leviticus 13:37.)

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.And if the priest look on the plague of the scall,.... As it may appear in another person, brought to him for inspection and examination:

and, behold, it be not in the sight deeper than the skin; it do not seem to be got into the flesh, or lower than the skin:

and that there is no black hair in it; or, "but no black hair in it"; for, as Jarchi says, if there was a black hair in it, he would be clean, and there would be no need of shutting up; for black hair in scalls is a sign of cleanness, as it is said, Leviticus 13:37; it would be a clear case that such a man had no leprosy on him; for black hair is a token of a strong and healthful constitution; and there could remain no doubt about it, and it would require no further trial and examination: Ben Gersom says it means two black hairs; and further observes, that black hair in the midst of a scall is a sign of cleanness; but this being wanting:

then the priest shall shut up him that hath the plague of the scall seven days; from the time of his viewing the scall; and so Ben Gersom, this is the seventh day from the time of looking upon the scall.