Leviticus 13:53-59

“But if the priest sees that the mark has not spread in the garment, either in the warp or the woof, or on anything made of leather, then the priest shall order that they wash the thing in which the mark occurs, and he shall quarantine it for seven more days. The priest shall examine the article with the mark after it has been washed, and if the mark has not changed color, even though the mark has not spread, it is unclean; you shall burn it in the fire; it is a corroding mildew, whether on the top or on the front of it. “If the priest looks and the mark has faded after it is washed, he shall tear it out of the garment, or the leather, or out of the warp or woof. If it still appears in the garment, either in the warp or in the woof, or on anything made of leather, it is an outbreak; you shall burn the marked part in the fire. The garment, whether the warp or the woof, or anything made of leather from which the mildew has departed after washing, shall then be washed a second time and it will be [ceremonially] clean.” This is the law for a leprous disease in a garment of wool or linen, either in the warp or woof, or on anything made of leather, to pronounce it clean or unclean.