Leviticus 13:3-10

³And the priest shall look on the plague in the skin of the flesh: and when the hair in the plague is turned white, and the plague in sight is deeper than the skin of his flesh, it is a plague of leprosy: and the priest shall look on him, and pronounce him unclean.

⁴If the bright spot is white in the skin of his flesh, and in sight, not deeper than the skin, and the hair of it not turned white; then the priest shall shut up him that hath the plague seven days:

⁵And the priest shall look on him the seventh day: and behold, if the plague in his sight is at a stay, and the plague spreadeth not in the skin; then the priest shall shut him up seven days more:

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

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

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

⁹When the plague of leprosy is in a man, then he shall be brought to the priest:

¹⁰And the priest shall see him : and behold, if the rising is white in the skin, and it hath turned the hair white, and there is raw flesh in the rising;