Leviticus 13:7-9

New American Standard Bible

⁷ “But if the rash spreads farther on the skin after he has shown himself to the priest for his cleansing, he shall appear again to the priest. ⁸ And the priest shall look, and if the rash has spread on the skin, then the priest shall pronounce him unclean; it is leprosy.

⁹ “When the infection of leprosy is on someone, then he shall be brought to the priest.