ייִדישער מחשבֿה אויף בראשית 32:30

But some explanation is still needed. For Jacob's having prevailed against the angel was beneficial in itself, that angel being the heavenly plenipotentiary of Esau, as we are told by our sages (Genesis Rabbah 67:2). His prevailing against him connotes the angel's not contesting Jacob's domination of Esau, but consenting to Isaac's blessing in full, as is implied by (Genesis 32:30): "And he blessed him there." And this is in accordance with our sages' dictum: "The Holy One Blessed be He does not exact payment from a people until He exacts it from its heavenly plenipotentiaries first." But Jacob's grasping Esau in the womb was merely a portent of what was to come and not anything beneficial in itself deserving of mention in the Blessed One's chastisements to Jacob.