Leviticus 13:56-59

13:56 But if the priest has examined it and the infection has faded after it has been washed, he is to tear it out of the garment or the leather or the warp or the woof. 13:57 Then if it still appears again in the garment or the warp or the woof, or in any article of leather, it is an outbreak. Whatever has the infection in it you must burn up in the fire. 13:58 But the garment or the warp or the woof or any article of leather which you wash and infection disappears from it is to be washed a second time and it will be clean.”

Summary of Infection Regulations

13:59 This is the law of the diseased infection in the garment of wool or linen, or the warp or woof, or any article of leather, for pronouncing it clean or unclean.