Leviticus 13:6-8

21st Century King James Version

⁶ And the priest shall look on him again the seventh day; and behold, if the plague be somewhat dark and the plague spread not in the skin, the priest shall pronounce him clean. It is but a scab, and he shall wash his clothes and be clean.

⁷ But if the scab spread much abroad in the skin, after he hath been seen by the priest for his cleansing, he shall be seen by the priest again.

⁸ And if the priest see that, behold, the scab spreadeth in the skin, then the priest shall pronounce him unclean; it is leprosy.