Leviticus 10:10

10You are to adistinguish between the holy and the common, and between the unclean and the clean,

Ezekiel 44:23

23 bThey shall teach my people the difference between the holy and the common, and cshow them how to distinguish between the unclean and the clean.

Malachi 2:7

7For dthe lips of a priest should guard knowledge, and people
Hebrew they
should seek instruction from his mouth, for he is the messenger of the Lord of hosts.
Copyright information for ESV