Leviticus 13:30

then the priest shall see the plague. And behold, if it is in sight deeper than the skin, and a yellow thin hair is in it, then the priest shall pronounce him unclean. It is a dry scab, a leprosy on the head or beard.

Leviticus 13:34-37

And in the seventh day the priest shall look on the scab. And behold, if the scab has not spread in the skin, nor is in sight deeper than the skin, then the priest shall pronounce him clean. And he shall wash his clothes and be clean.

Leviticus 14:54

This is the law for all kinds of plague of leprosy and scab,

Treasury of Scripture Knowledge

Summary

Then the priest shall see the plague: and, behold, if it be in sight deeper than the skin; and there be in it a yellow thin hair; then the priest shall pronounce him unclean: it is a dry scall, even a leprosy upon the head or beard.

Bible References

Scall

Leviticus 13:34
And in the seventh day the priest shall look on the scab. And behold, if the scab has not spread in the skin, nor is in sight deeper than the skin, then the priest shall pronounce him clean. And he shall wash his clothes and be clean.
Leviticus 14:54
This is the law for all kinds of plague of leprosy and scab,