(Bamidbar, Ibid.) "And it shall be, if by the eyes of the congregation it were done in error": This mitzvah was allotted a special section in itself. Which is that? (the injunction against) idolatry. "then all the congregation shall offer one young bullock as a burnt-offering." Why mention "one"?
For it would follow (otherwise), viz.: If where the congregation does not bring a bullock for a burnt-offering it brings a bullock for a sin-offering, (viz. Vayikra 4:14), then here, where the congregation does bring a bullock for a burnt-offering, how much more so should it bring a bullock for a sin-offering! It is, therefore, written "then all the congregation shall offer (only) one young bullock." "with its meal-offering and its libation": that of the burnt-offering. — But perhaps also that of the sin-offering (is intended).
It is, therefore, written (Ibid.) "as ordained" (and no libation is ordained for a sin-offering). "and one kid of goats as a sin-offering": Why mention "one"? For it would follow (otherwise), viz.: If (on Yom Kippur), where the congregation does not bring a bullock for a burnt-offering, it brings two he-goats for a sin-offering, then here, where it does bring a bullock for a burnt-offering, how much more so should it bring two he-goats for a sin-offering! It is, therefore, written "and one kid of goats as a sin-offering."