Leviticus 13:6-8

New Century Version

⁶ On the seventh day the priest must look at the person again. If the sore has faded and has not spread on the skin, the priest must announce that the person is clean. The sore is only a rash. The person must wash his clothes, and he will become clean again.

⁷ “But if the rash spreads again after the priest has announced him clean, the person must come again to the priest. ⁸ The priest must look at him, and if the rash has spread on the skin, the priest must announce that the person is unclean; it is a harmful skin disease.