Littérature du Second Temple sur La Genèse 25:33

וַיֹּ֣אמֶר יַעֲקֹ֗ב הִשָּׁ֤בְעָה לִּי֙ כַּיּ֔וֹם וַיִּשָּׁבַ֖ע ל֑וֹ וַיִּמְכֹּ֥ר אֶת־בְּכֹרָת֖וֹ לְיַעֲקֹֽב׃

Jacob dit: "Jure le moi dès à présent." Et il lui fit serment et il vendit son droit d’aînesse à Jacob.

On the Birth of Abel and the Sacrifices Offered by him and by his Brother Cain

[17] For he shows us Esau, who is named after his folly, as elder in point of age, but it is to the younger brother named from his discipline and practice of things excellent, even Jacob, that he awards the prize of precedence. Yet Jacob will not judge himself worthy to accept this prize until, as in some contest of the arena, his adversary has surrendered in exhaustion and yielded up the victor’s crown to him who has waged war without parley or quarter against the passions. For Esau ‘sold,’ we read, the ‘birthright to Jacob’ (Gen. 25:33),