'Vows' in the Bible

“But cursed is the swindler who has a male in his flock and vows [to offer] it, but sacrifices to the Lord a blemished or diseased thing! For I am a great King,” says the Lord of hosts, “and My name is to be [reverently and greatly] feared among the nations.”

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].