Leviticus 13:51

And he shall look on the plague. — If at the end of the week, when the priest examines it again, he finds that the distemper has spread, it undoubtedly indicates malignant leprosy. Here, again, the symptom of spreading is the same in the garment as in the human being. (See Leviticus 13:5; Leviticus 13:8, &c.) The leprous garment, like a human leper, makes everything and everybody unclean by contact with it, or by coming into the house where it remains.