But when the priest reexamines it, if the mildew has not spread in the fabric, weave, knit, or leather article,

Leviticus 13:48
any weave or knit of linen or wool, or any article of leather--

Leviticus 13:52
He is to burn the fabric, weave, or knit, whether the contaminated item is wool or linen or leather. Since the mildew is harmful, the article must be burned up.

Leviticus 13:54
the priest is to order the contaminated article to be washed and isolated for another seven days.

And if the priest shall look, and, behold, the plague be not spread in the garment, either in the warp, or in the woof, or in any thing of skin;