Leviticus 13:37

On the seventh day, the priest shall examine the itch; and behold, if the itch hasn’t spread in the skin, and its appearance isn’t deeper than the skin, then the priest shall pronounce him clean. He shall wash his clothes and be clean.

But if the itch spreads in the skin after his cleansing,

then the priest shall examine him; and behold, if the itch has spread in the skin, the priest shall not look for the yellow hair; he is unclean.

“When a man or a woman has bright spots in the skin of the body, even white bright spots,

then the priest shall examine them. Behold, if the bright spots on the skin of their body are a dull white, it is a harmless rash. It has broken out in the skin. He is clean.

“If a man’s hair has fallen from his head, he is bald. He is clean.