Malachi 2:6-8

6True instruction was in Levi’s mouth and injustice was not found on his lips. He walked with Me in peace and uprightness, and he turned many from wickedness.

7For the lips of the priest should guard and preserve knowledge [of My law], and the people should seek instruction from his mouth; for he is the messenger of the Lord of hosts.

8But as for you [priests], you have turned from the way and you have caused many to stumble by your instruction [in the law]. You have violated the covenant of Levi,” says the Lord of hosts.