Ezekiel 44:23 in the World English Bible
They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.
Context
22 Neither shall they take for their wives a widow, nor her that is put away: but they shall take maidens of the seed of the house of Israel, or a widow that had a priest before.
23 And they shall teach my people the difference between the holy and profane, and cause them to discern between the unclean and the clean.
24 And in controversy they shall stand in judgment; and they shall judge it according to my judgments: and they shall keep my laws and my statutes in all mine assemblies; and they shall hallow my sabbaths.