Malachi 2:10

In view of their common brotherhood in the family of God, it was inappropriate for the Israelites to treat each other as enemies and deal treacherously with each other. They should have treated each other as brothers and supported one another (Leviticus 19:18). By dealing treacherously with each other they had made the covenant that God had made with their ancestors virtually worthless; they could not enjoy the blessings of the Mosaic Covenant.

". . . the Mosaic covenant was by Malachi’s time understood as a quaint, archaic document too restrictive to be taken seriously and inapplicable to a ’modern’ age-virtually the same way that most people in modern Western societies view the Bible today." [Note: Stuart, p. 1332.]