Leviticus 13:30

then shall the priest view the spot and lo! if, the appearance thereof, is deeper than the skin, and, therein, is yellow, thin hair, then shall the priest pronounce him unclean a scall, it is, a leprosy of the head or of the beard, it is.

Leviticus 13:34-37

then shall the priest view the scall, on the seventh day, and lo! if the sea hath not spread in the skin, and, the appearance thereof, is not deeper than the skin, then shall the priest pronounce him clean, and he shall wash his clothes, and be clean.

Leviticus 14:54

This, is the law, - for every plague-mark of leprosy and for scall;

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
then shall the priest view the scall, on the seventh day, and lo! if the sea hath not spread in the skin, and, the appearance thereof, is not deeper than the skin, then shall the priest pronounce him clean, and he shall wash his clothes, and be clean.
Leviticus 14:54
This, is the law, - for every plague-mark of leprosy and for scall;