Leviticus 13:2-8

2When a man shall have in the skin of his flesh a swelling, a scab, or bright spot, and it be in the skin of his flesh like the plague of leprosy; then he shall be brought to Aaron the priest, or to one of his sons the priests:1

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.