Leviticus 13:48

Whether it be in the warp, or woof; of linen, or of woollen; whether in a skin, or in any thing made of skin;

The law reached woven fabric of wool and of linen, whether the defect lay in the lengthwise warp threads or in the crosswise woof threads. It reached also raw hides and every finished object made from hide. Any such material showing a plague-like taint could be examined, and when the taint spread it was to be pronounced unclean and burned.