Commentaries:
Barnes' Notes
Moses did not originate the rights of primogeniture (compare Genesis 25:31), but recognized them, since he found them pre-existing in the general social system of the East. Paternal authority could set aside these rights on just grounds Genesis 27:33, but it is forbidden here to do so from mere partiality.
Other Barnes' Notes entries containing Deuteronomy 21:15:
Genesis 46:1-34
1 Samuel 1:2
2 Chronicles 11:22
2 Chronicles 21:3
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