(Bamidbar 7:84) This is the (accounting of the) inauguration of the altar on the day that it was anointed": What is the intent of this? Because it is written (Ibid. 88) "This is the (accounting of the) inauguration of the altar after it was anointed," I might think after (a relatively long period of) time; it is, therefore, written "on the day that it was anointed." If on the day that it was anointed, I might think that before it was anointed the offering was brought; it is, therefore, written "after it was anointed" — On the day that it was anointed, on the very same day he brought the offering — after it was anointed.
Similarly, (Vayikra 7:35-36) "This is the (portion of the) anointment of Aaron and of the anointment of his sons … which the L-rd commanded to give to them on the day that he anointed them" — On the day that they were anointed they merited receiving the (priestly) gifts. — But perhaps the meaning is that on that day they were commanded (to give the gifts), but they did not actually receive them until a later time.
It is, therefore, written (Ibid. 35) "… of the fire-offerings of the L-rd on the day that he presented them to minister to the L-rd" — On the day that they were anointed, they merited receiving the gifts. If so, what is the intent of "which the L-rd commanded to give to them on the day that he anointed them"? We are hereby taught that they (Israel) were commanded (to give them) on Mount Sinai, but they (the Cohanim) did not acquire them until they had been anointed with the oil of anointment. (Bamidbar 7:84) "by the chiefs of Israel": We are hereby taught that just as they were all united in counsel (to bring the offerings), so, they were all "united" in merit. "silver dishes, twelve": the very ones that they donated, their not having become unfit (for service).