Malachi 2:7-9

For the lips of a priest should preserve knowledge, and men should seek instruction from his mouth; for he is the messenger of the LORD of hosts. But as for you, you have turned aside from the way; you have caused many to stumble by the instruction; you have corrupted the covenant of Levi,” says the LORD of hosts. “So I also have made you despised and abased before all the people, just as you are not keeping My ways but are showing partiality in the instruction.