Leviticus 13:57-59

57But if it appears again in the garment, either in the warp or in the woof, or in anything made of leather, it is a spreading plague; you shall burn with fire that in which is the plague.

58And if you wash the garment, either warp or woof, or whatever is made of leather, if the plague has disappeared from it, then it shall be washed a second time, and shall be clean.

59“This is the law of the leprous plague in a garment of wool or linen, either in the warp or woof, or in anything made of leather, to pronounce it clean or to pronounce it unclean.”