Malachi 2:14-16

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. “For I hate divorce,” says the LORD, the God of Israel, “and him who covers his garment with wrong and violence,” says the LORD of hosts. “Therefore keep watch on your spirit, so that you do not deal treacherously [with your wife].”