"And Jacob was left alone" (Genesis 32:25). And why did he remain? Because he had forgotten some small jars. This teaches you that the righteous cherish their money more than their bodies. "And a man wrestled with him" (Genesis 32:25) — this was the prince of Esau. "And he wrestled" (vaye'avek) — for the dust (avak) of their feet rose up as far as the Throne of Glory.
Why Jacob Stayed Alone and Wrestled the Prince of Esau
Midrash Aggadah, Genesis 32:25
ויותר יעקב לבדו. ולמה נשאר לפי ששכח פכים קטנים, ללמדך שמחבבין הצדיקים ממונם יותר מגופם: ויאבק איש עמו. שרו של עשו היה: ויאבק. שאבק רגליהם עלה עד כסא הכבוד: