יַעֲבָר־נָ֥א אֲדֹנִ֖י לִפְנֵ֣י עַבְדּ֑וֹ וַאֲנִ֞י אֶֽתְנָהֲלָ֣ה לְאִטִּ֗י לְרֶ֨גֶל הַמְּלָאכָ֤ה אֲשֶׁר־לְפָנַי֙ וּלְרֶ֣גֶל הַיְלָדִ֔ים עַ֛ד אֲשֶׁר־אָבֹ֥א אֶל־אֲדֹנִ֖י שֵׂעִֽירָה׃
Let my lord pass on before his servant, and I will lead on slowly, according to the pace of the work that is before me and according to the pace of the children, until I come to my lord, to Seir.
Torah Temimah points to Bereshit Rabbah 78:14.
Sefaria · Bereshit Rabbah 78:14
עד אשר אבא אל אדני שעירה — ואימתי בא? לעתיד לבוא, שנאמר ועלו מושיעים בהר ציון לשפוט את הר עשו.
“Until I come to my lord, to Seir” — And when did he come? In the future to come, as it is said: “And saviors shall go up on Mount Zion to judge the mount of Eisav.”
The Midrash reads Yaakov’s words as deferred to the eschatological future.
Derash on the deferred meeting (Bereshit Rabbah).
Yaakov’s statement about coming to Seir is understood as referring to the future judgment of Eisav.