The Daily Ma’amar of our Rebbe Rav Eliezer Berland shlit”a, courtesy of the “Hashem Hu HaElokim” leaflet:
Mishael and Elitzafan, the sons of Uziel, that they merited to the level of “Elitzafan” — the everything is [in] secret, like Satur ben Michael [that “Satur” shares the root with the word “seter,” meaning hidden/secret], the leader of the tribe of Asher, who was among the spies, and he had needed, through his hidden work, to draw the lights of the Infinite to the Land of Israel, and to elevate it from Yetzirah to Beriyah, and from Beriyah to Atzilut, that this was the entire goal of Nadav and Avihu, to elevate all the Jewish people, who already merited to the world of Yetzirah, to elevate them to Beriyah and Atzilut, through the pure incense which has 11 spices, to subdue the 11 chieftains of Esav.
That this is the secret of Serach 508 bat 402 Asher 501 = 1411, who came from Asher, and only she entered with her body to the Garden of Eden. Only she can fulfill the verse “And it was turned about, that 501 the Jews 80 prevailed 355, them 50 over their adversaries 414,” 11 [= 1411] chieftains.
Because only the tribe of Asher, that it is said of it, “May your borders be sealed like iron and copper,” only it can subdue the wicked and all 11 chieftains of Esav. Therefore, the tribal prince, its spy, is called “Satur ben Michael,” because only the tribe of Asher merited that all of its deeds were in the ultimate secrecy.
And the angel Michael, it happened with him during the whole period of the judges and the First Temple, that the Kohanim — especially Kohanim Gedolim — and all the kings of the House of David only married women from the tribe of Asher. Therefore, Leah said “In my good fortune [BeOshri]! For women have deemed me fortunate [Ishruni]!”
And all of this Nadav and Avihu wanted to reach immediately after leaving Egypt, because then the contamination of the serpent was eliminated, and they were fitting for the revival of the dead and all the levels in the world, and to be included in Atzilut.