Kommentar zu Bereschit 32:30

למה זה תשאל WHEREFORE IS IT THAT THOU DOST ASK [AFTER MY NAME]? — We have no fixed names; our names change, all depending upon the service we are commanded to carry out as the errand with which we are charged (Genesis Rabbah 78:4).

WHY IS IT THAT THOU DOST ASK AFTER MY NAME? The angel said: “There is no advantage to you in knowing my name for no one possesses the power and the capability other than G-d alone. If you will call upon me I will not answer you, nor will I save you from your trouble. However, I will now bless you, for so I am commanded.”⁷⁷Leviticus 8:35. But Scripture does not explain the contents of the blessing. That which our Rabbis have said⁷⁸Mentioned in Rashi, Verse 27. See also the explanatory note on this verse in my Hebrew commentary, p. 186. is most probable, namely that the angel, despite himself, conceded to him at that place the legitimacy of his father’s blessings, as Jacob did not wish to wait for him until he arrived at Beth-el.

הגידה נא שמך, which would describe your essence, your function, and how you would go about performing same. This would enable me to understand why you attacked me in the first place. I would then be able to do penitence for my sin, something I cannot do as long as I do not know what precisely my sin consists of.