Malachi 2:7-15

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] As for the man who does this, may the LORD cut off from the tents of Jacob to the last man those who do this [evil thing], awake and aware, even the one who brings an offering to the LORD of hosts. This is another thing you do: you cover the altar of the LORD with tears, with [your own] weeping and sighing, because the LORD no longer regards your offering or accepts it with favor from your hand. But you say, “Why [does He reject it]?” Because the LORD has been a witness between you and the wife of your youth, against whom you have dealt treacherously. Yet she is your marriage companion and the wife of your covenant [made by your vows]. But not one has done so who has a remnant of the Spirit. And what did that one do while seeking a godly offspring? Take heed then to your spirit, and let no one deal treacherously against the wife of your youth.