Leviticus 13:49-51

American Standard Version

⁴⁹ if the plague be greenish or reddish in the garment, or in the skin, or in the warp, or in the woof, or in anything of skin; it is the plague of leprosy, and shall be showed unto the priest. ⁵⁰ And the priest shall look upon the plague, and shut up that which hath the plague seven days: ⁵¹ and he shall look on the plague on the seventh day: if the plague be spread in the garment, either in the warp, or in the woof, or in the skin, whatever service skin is used for; the plague is a fretting leprosy; it is unclean.