Leviticus 13:54-56

⁵⁴the priest shall order that the affected item is washed and placed in isolation for another seven days.

⁵⁵Once it has been washed, the priest is to inspect again it, and if the item with the mold hasn't changed how it looks, it is unclean. Though the mold hasn't spread, you must burn the item, whether the mold damage is on the inside or the outside.

⁵⁶If the priest inspects it and the patch of mold has faded after it has been washed, he is to cut out the affected part the material, whether it's leather, woven, or knitted.