Leviticus 13:39

then the priest shall look; and, behold, if the bright spots in the skin of their flesh be darkish white, without the luster peculiar to an inner swelling and inflammation, it is a freckled spot that groweth in the skin; he is clean. "It is an eruption on the skin, appearing in somewhat elevated spots or rings of unequal sizes and a pale-white color, which do not change the hair; it causes no inconvenience, and lasts from two months to two years. " (Keil.)