Rashi on Genesis 32:25/רש"י על בראשית ל״ב:כ״ה

1ויותר יעקב AND JACOB WAS LEFT ALONE — He had forgotten some small jars and he returned for them (Chullin 91a).

2ויאבק איש AND A MAN WRESTLED — Menachem (ben Seruk) explains: “a man covered himself with dust”, taking the verb as connected in sense with אבק “dust”. It would mean that they were raising the dust with their feet through their movements. I, however, am of opinion that it means “he fastened himself on”, and that it is an Aramaic word, as (Sanhedrin 63b) “after they have joined (אביקו) it", and (Menachot 42a) “and he twined (the “Fringes”) with loops”. It denotes “intertwining”, for such is the manner of two people who make strong efforts to throw each other — one clasps the other and twines himself round him with his arms. Our Rabbis of blessed memory explained that he was Esau’s guardian angel (Genesis Rabbah 77:3).