Leviticus 13:51
And he shall look on the plague on the seventh day: if the plague be spread in the garment, either in the warp, or in the woof, or in a skin, or in any work that is made of skin; the plague is a fretting leprosy; it is unclean. And he shall look on the plague on the seventh day: if the plague be spread in the garment, either in the warp, or in the woof, or in a skin, or in any work that is made of skin; the plague is a fretting leprosy; it is unclean.
The priest was to examine the plague in the fabric on the seventh day. If by that inspection the plague had spread in the garment, whether in its warp or in its woof, or in a skin, or in any work made of skin, it was to be judged a fretting leprosy. Such a spreading plague rendered the article unclean. The contaminated garment was then to be destroyed by burning.