Leviticus 13:22

But if it manifestly spread over the skin, then the priest shall pronounce him unclean: it is a plague of leprosy; it has broken out in the ulcer.

And if it spread much abroad in the skin, then the priest shall pronounce him unclean: it is a plague.

If it spreads in the skin, then the priest shall pronounce him unclean. It is a plague.