Leviticus 14:57
to teach when it is unclean, and when it is clean. This is the law of a leprous disease.
Leviticus 10:10
and that ye may make a distinction between the holy and the common, and between the unclean and the clean,
Deuteronomy 24:8
Take heed in the disease of leprosy, that thou observe diligently, and do according to all that the priests the Levites shall teach you. As I commanded them, so ye shall observe to do.
Jeremiah 15:19
Therefore thus says LORD: If thou return, then I will bring thee again that thou may stand before me. And if thou take forth the precious from the vile, thou shall be as my mouth. They shall return to thee, but thou shall not retur
Ezekiel 44:23
And they shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.