Leviticus 13:56

“If the priest examines it, and behold, the plague hasn’t spread in the garment, either in the warp, or in the woof, or in anything of skin;

then the priest shall command that they wash the thing that the plague is in, and he shall isolate it seven more days.

Then the priest shall examine it, after the plague is washed; and behold, if the plague hasn’t changed its color, and the plague hasn’t spread, it is unclean; you shall burn it in the fire. It is a mildewed spot, whether the bareness is inside or outside.

and if it appears again in the garment, either in the warp, or in the woof, or in anything of skin, it is spreading. You shall burn what the plague is in with fire.

The garment, either the warp, or the woof, or whatever thing of skin it is, which you shall wash, if the plague has departed from them, then it shall be washed the second time, and it will be clean.”

This is the law of the plague of mildew in a garment of wool or linen, either in the warp, or the woof, or in anything of skin, to pronounce it clean, or to pronounce it unclean.