Leviticus 13:52-56

⁵²He shall burn the garment, either the warp or woof in woollen garments or in flaxen, or in any utensil of skin, in which there may be the plague; because it is a confirmed leprosy; it shall be burnt with fire.

⁵³And if the priest should see, and the plague be not spread in the garments, either in the warp or in the woof, or in any utensil of skin,

⁵⁴then the priest shall give directions, and one shall wash that on which there may have been the plague, and the priest shall set it aside a second time for seven days.

⁵⁵And the priest shall look upon it after the plague has been washed; and if this, even the plague, has not changed its appearance, and the plague does not spread, it is unclean; it shall be burnt with fire: it is fixed in the garment, in the warp, or in the woof.

⁵⁶And if the priest should look, and the spot be dark after it has been washed, he shall tear it off from the garment, either from the warp or from the woof, or from the skin.