To which revelation of the Shechinah is the Pasuk referring? What is the connection between the revelation and the Korbanos that they were now bringing?
Rashi and Rashbam: It refers to the fire that was about to descend from the Heaven 1 to consume the Korbanos 2 that they were now bringing.
Seforno: It refers to the Shechinah that filled the Mishkan after Moshe finally erected it, 3 in acknowledgement of the work of their hands, and in whose honor the current Korbanos were being brought.
Rosh: The open revelation of Shechinah showed all mankind that [Yisrael] were forgiven for Chet ha'Egel. The letters of "Nir'ah Aleichem" (Pasuk 4) contain the letters of both Aharon and Micha'el. Michael was appointed 4 to advocate for Yisrael in Shamayim.
Yerushalmi Yoma 1:5: 'This teaches us that during the entire seven days of Milu'im, Moshe served as Kohen Gadol, but the Shechinah did not descend on his account. But as soon as Aharon donned the Bigdei Kehunah Gedolah and began to serve, the Shechinah descended on his account.
See Sifsei Chachamim.
See Sh'mos 40:34:1:1*.
Rosh: And the repetition of the word 'Z'kan' in "ka'Shemen ha'Tov? Al ha'Zakan Z'kan Aharon" (Tehilim 133:2) hints that also the angel Micha'el was anointed. The letters of "Nir'ah Aleichem" (Pasuk 4) contain the letters of both Aharon and Micha'el. Michael was appointed to advocate for Yisrael in Shamayim.
Why did the Tzibur offer an ox and a ram for Shelamim?
Moshav Zekenim #1: The ox atones for "Va'Yamiru es Kevodam be'Savnis Shor" (Tehilim 106:20)" If it prosecutes, the ram of Akeidas Yitzchak advocates against it.
Moshav Zekenim #2: The ox corresponds to Avraham, who ran to the Bakar [to take oxen for his guests]. The ram corresponds to Yitzchak, and the Minchah mixed with oil corresponds to the Imahos.
