The following is a brief summary of some of thoughts said over by R' Frand on the parsha this evening. I have attempted to reproduce these vorts to the best of my ability. Any perceived inconsistency is the result of my efforts to transcribe the shiur and should not be attributed to R' Frand.
R' Frand began his vort by quoting the gemara in Berachos 7b in which R' Yochanan states in the name of R' Shimon Bar Yochai that until Avraham, no one had called Hashem an Adon (master) until Avraham used this terminology to address Hashem.
R' Frand then quoted the sefer Ishei Yisrael which was written by the Maggid of Vilna who asked --why do we begin davening every day by saying the prayer Adon Olam? He answered his question by quoting a gemara in Tamid which described the process of offering the Tamid sacrifice of the morning.
The gemara in Tamid states that they would not begin the process until sunrise and since they were indoors, they required someone to go out and relay to them that the sun had in fact risen. As part of the process, there was a question asked to the "outsider" if the skies above Hebron were alight as well. The Maggid of Vilna then asked --if the sacrifice was being offered in Jerusalem, why did the process involve asking whether the sun had risen in Hebron?
The Maggid answered that in beginning the Tamid process, they wanted to invoke z'chus avos. In order to do that, they would mention the city of Hebron which was where our forefathers Yitzchak and Yaakov were born (I would have presumed that it had to do with Ma'aras HaMachpeilah, but that was not the answer he gave).
R' Frand then tied the vort back to Adon Olam, explaining that the reason that we begin Shacharis with that prayer is to invoke z'chus avos by reminding Hashem that his beloved Avraham was the first person to call him an Adon.
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