Leviticus 13:21
But if the priest look on it, and, behold, there be no white hairs therein, and if it be not lower than the skin, but be somewhat dark; then the priest shall shut him up seven days:
But if the priest look on it,.... Upon a person in a like case as first described, having had a boil, and that healed, and afterwards a white swelling, or a bright spot in the place of it:
and, behold, there be no white hairs therein; not two hairs turned white, as Gersom interprets it:
and if it be not lower than the skin; the bright spot not lower than the skin; not having got into the flesh, only skin deep: the Targum of Jonathan is, not lower in whiteness than the skin; for the bright spot is described as white, and so the rising or swelling,
but be somewhat dark; or rather "contracted"; to which spreading is opposed in the next verse; See Gill on "Leviticus 13:6";
then the priest shall shut him up seven days; to wait and see whether it will spread or not: a boil and burning, the Jews say, make a man unclean in one week, and by two signs, the white hair, and the spreading; by the white hair, both at the beginning and at the end of the week after dismission, and by spreading at the end of the week after it {q}.
{q} Misn. Negaim, c. 3. sect. 4.