Malachi 2:6-9

True 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. For 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. But 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. “So I have also made you despised and abased before all the people, just as you are not keeping My ways but are showing partiality [to people] in [your administration of] the law.”