Malachi 2:7-9

7For the lips of a priest should preserve knowledge of sacred things, and people should seek instruction from him because he is the messenger of the Lord who rules over all.

8You, however, have turned from the way. You have caused many to violate the law; you have corrupted the covenant with Levi,” says the Lord who rules over all.

9“Therefore, I have caused you to be ignored and belittled before all people to the extent to which you are not following after me and are showing partiality in your instruction.”