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.