Malachi 2:4-11

Then you will know [without any doubt] that I have sent this [new] commandment to you (priests), that My covenant may continue with Levi [the priestly tribe],” says the LORD of hosts. “My covenant with Levi was [one of] life and peace, and I gave them to him as an object of reverence; so he [and the priests] feared Me and stood in reverent awe of My name. 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.” Do we not all have one Father? Has not one God created us? Why do we deal treacherously with one another, profaning the covenant of our fathers [with God]? Judah has been treacherous (disloyal), and a repulsive act has been committed in Israel and in Jerusalem; for Judah has profaned the sanctuary of the LORD which He loves, and has married the daughter of a foreign god. [Ezra 9:2; Jer 2:3]