Leviticus 13:30

And if the bright spot stay in his place, [and] spread not in the skin, but it [be] somewhat dark; it [is] a rising of the burning, and the priest shall pronounce him clean: for it [is] an inflammation of the burning.

If a man or woman have a plague upon the head or the beard;

And if the priest look on the plague of the scall, and, behold, it [be] not in sight deeper than the skin, and [that there is] no black hair in it; then the priest shall shut up [him that hath] the plague of the scall seven days:

And in the seventh day the priest shall look on the plague: and, behold, [if] the scall spread not, and there be in it no yellow hair, and the scall [be] not in sight deeper than the skin;