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 hair; then the priest shall pronounce him unclean: it is a dry scall, even a leprosy upon the head or beard.
The priest is here instructed what judgment to make if there was any appearance of a leprosy, either, 1. In an old ulcer, or bile, that has been healed, Lev 13:18, etc. When old sores, that seemed to be cured, break out again, it is to be feared there is a leprosy in them; such is the danger of those who, having escaped the pollutions...
Commenting on Leviticus 13:18-37
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...
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 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.