Leviticus 13:5-7

New Revised Standard Version Catholic Edition

⁵ The priest shall examine him on the seventh day, and if he sees that the disease is checked and the disease has not spread in the skin, then the priest shall confine him seven days more. ⁶ The priest shall examine him again on the seventh day, and if the disease has abated and the disease has not spread in the skin, the priest shall pronounce him clean; it is only an eruption; and he shall wash his clothes, and be clean. ⁷ But if the eruption spreads in the skin after he has shown himself to the priest for his cleansing, he shall appear again before the priest.