TSK · Leviticus 14:57

and that you are to make a distinction between the holy and the common, and between the unclean and the clean;

Take heed in the plague of leprosy, that you observe diligently, and do according to all that the priests the Levites shall teach you: as I commanded them, so you shall observe to do.

They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.