מדרש אויף ויקרא 8:22

19) (Vayikra 8:22): "And he presented the second ram": Now has Scripture not already mentioned the two rams, (viz. Vayikra 8:2: "and the two [connoting "identical"] rams")? Why, then, is it necessary to state "And he presented the second ram"? (To imply) that if he brought a bullock and (only) one of the rams, he has not effected the sanctification; two rams and no bullock, he has not effected the sanctification; two rams and a bullock and not the basket of unleavened bread, (viz. Vayikra 8:26) he has not effected the sanctification.

20) "the ram of the miluim": ("miluim") connoting that it completes the entire (service), ending (the service) for Aaron and his sons. "and Aaron and his sons placed their hands on the head of the ram": They placed their hands upon it in joy, as in a festival, as one who paid off his debt and made a festival (of it). Here, too, Aaron and his sons, ending the service of the day and its sanctifications and the service of the vessels and its sanctifications, brought a ram and placed their hands upon it in joy, making a "festival" (of it).