“When a man has a swelling on the skin of his body or a scab or a bright spot, and it becomes the plague-mark of tza'arat in his flesh, then he shall be brought to Aaron the kohen, or to one of his sons, the kohanim.
But if the kohen examines it and sees there are no white hairs within, and if it is not deeper than the skin but is faded, then the kohen is to isolate him seven days.