Malachi 2:13-14

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].