Leviticus 13:51-52

51He must then examine the infection on the seventh day. If the infection has spread in the garment, or in the warp, or in the woof, or in the leather – whatever the article into which the leather was made – the infection is a malignant disease. It is unclean.

52He must burn the garment or the warp or the woof, whether wool or linen, or any article of leather which has the infection in it. Because it is a malignant disease it must be burned up in the fire.