Leviticus 13:49 (KJV)

The garment also that the plague of leprosy is in, whether it be a woollen garment, or a linen garment;

Whether it be in the warp, or woof; of linen, or of woollen; whether in a skin, or in any thing made of skin;

And if the plague be greenish or reddish in the garment, or in the skin, either in the warp, or in the woof, or in any thing of skin; it is a plague of leprosy, and shall be shewed unto the priest:

And the priest shall look upon the plague, and shut up it that hath the plague seven days:

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 a skin, or in any work that is made of skin; the plague is a fretting leprosy; it is unclean.