Why the Shechinah Waited for Aaron on the Eighth Day

14) (Vayikra 9:1): "And it was on the eighth day": the eighth day of the consecration of Aaron and his sons. — But perhaps the eighth day of the month is being referred to! — (This cannot be, for) it is written (Shemoth 40:17): "And it was in the first month of the second year on the first of the month that the mishkan was set up" — whereby we are taught that the mishkan was set up on Rosh Chodesh (Nissan). I might think that it was set up on Rosh Chodesh and the shechinah reposed upon it on the eighth of the month; it is, therefore, written (Bamidbar 9:15): "And on the day that the mishkan was erected, the cloud covered the mishkan) — whereby we are taught that on the very day that the mishkan was set up the shechinah reposed on the handiwork of Aaron. For all of the (first) seven days of the miluim Moses served (as high-priest) and the shechinah did not repose (there) through him — until Aaron came (on the eighth day) and ministered in the vestments of the high-priesthood and the shechinah reposed (there) through him, as it is written thereof (Vayikra 9:4): "For today the L–rd will appear to you."