Leviticus 13:8

And if the priest sees that the scab has indeed spread on the skin, then the priest shall pronounce him unclean. It is leprosy.

Surrounding context

13:7 But if the scab should at all spread over the skin, after he has been seen by the priest for his cleansing, he shall be seen by the priest again.

13:8 And if the priest sees that the scab has indeed spread on the skin, then the priest shall pronounce him unclean. It is leprosy.

13:9 "When the leprous sore is on a person, then he shall be brought to the priest.

Translation and sources