Genesis Genesis 36:1–37:1
Genesis 36 closes the line of the non-elect brother: Esau is Edom, settled with chiefs and kings and a possession in hand — before Israel has a single king, and while Jacob still only sojourns. The genealogy's placement is its argument: election runs through the sojourner, not the settled.
Genesis Genesis 25:19-34
Two boys crush each other in the womb of Rebekah, an oracle inverts primogeniture before they are born, and a bowl of red stew costs Esau the birthright. The Septuagint of Genesis 25:23 becomes the verbatim five-word election text Paul quotes at Romans 9:12; the closing Hebrew verb of contempt at Genesis 25:34 returns at Obadiah on the nation Esau fathered.
Obadiah 1:1–21
Obadiah is twenty-one verses long. It opens with one brother's betrayal of another on a specific day (586 BC) and ends with the declaration לַיהוָה הַמְּלוּכָה — a phrase Psalm 22 also makes, and that appears nowhere else in the canon. The little book carries a large argument.