Leviticus 13:5-7

New Century Version

⁵ On the seventh day the priest must look at the person again. If he sees that the sore has not changed and it has not spread on the skin, the priest must keep the person separated for seven more days. 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.