Leviticus 14:44

14:44 the priest is to come and examine it, and if ¹  the infection has spread in the house, it is a malignant disease in the house. It is unclean.

Leviticus 13:52

13:52 He 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.

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¹ tn Heb “and behold” (so KJV, ASV); NASB “If he sees that the mark has indeed spread.”