If a man has two wives, one beloved, and another hated, and they have borne him children, both the beloved and the hated; and if the firstborn son be hers that was hated:
All Commentaries on Deuteronomy 21:15 Go To Deuteronomy 21
George Leo Haydock
AD 1849
Two wives. Moses never expressly (Haydock) sanctions polygamy; but he tolerates it frequently, as excused by custom, the example of the Patriarchs; a toleration which Christ has revoked, as contrary to the primary design of God, and the institution of matrimony. (Calmet) (Matthew xix.)