Deuteronomy 21:15

15 `When a man hath two wives, the one loved and the other hated, and they have borne to him sons (the loved one and the hated one), and the first-born son hath been to the hated one;

Deuteronomy 21:15 Meaning and Commentary

Deuteronomy 21:15

If a man have two wives
Which is supposed, but not approved of, though permitted because of the hardness of men's hearts; for it was not so from the beginning, when only one man and one woman were created, and joined together in marriage; but as it was connived at, and become customary, a law is made to prevent confusion, and preserve order in families:

one beloved and another hated;
or less loved, yet continued his wife, and not divorced. Aben Ezra observes, this follows upon the former, because it is there said, that though first he had a desire to her (the captive beautiful woman), yet afterwards had no delight in her:

and they have borne him children both, the beloved and the hated;
as Rachel and Leah did to Jacob, who were, the one very much beloved by him, and the other less:

and if the firstborn son be hers that was hated;
or not so much beloved as the other, as was the case in the above instance.

Deuteronomy 21:15 In-Context

13 and turned aside the raiment of her captivity from off her, and hath dwelt in thy house, and bewailed her father and her mother a month of days, and afterwards thou dost go in unto her and hast married her, and she hath been to thee for a wife:

14 `And it hath been -- if thou hast not delighted in her, that thou hast sent her away at her desire, and thou dost not at all sell her for money; thou dost not tyrannize over her, because that thou hast humbled her.

15 `When a man hath two wives, the one loved and the other hated, and they have borne to him sons (the loved one and the hated one), and the first-born son hath been to the hated one;

16 then it hath been, in the day of his causing his sons to inherit that which he hath, he is not able to declare first-born the son of the loved one, in the face of the son of the hated one -- the first-born.

17 But the first-born, son of the hated one, he doth acknowledge, to give to him a double portion of all that is found with him, for he [is] the beginning of his strength; to him [is] the right of the first-born.