Commentary for Ezekiel 45:20

And so shall you do on seven [days] in the month It may be said that [this means]: And so shall you do all seven, and so too he says above (43:26): “For seven days they shall effect atonement for the altar.” But our Rabbis explained it in Menahoth (45a) in the following manner: And so shall you make [as a sacrifice] a bull that is not to be eaten in [the event of] “seven” tribes who “interpreted the Torah in a new way (שֶּׁחְדֹּשּׁוּ)” and whose tribunal issued a decision that fat is permissible, and seven tribes, (which are the majority of the nation), who acted on their word. They must bring a bull for communal error.

because of mistaken and simple-minded men This is a transposed verse: And you shall expiate the House from mistaken and simple-minded men. After the seven days of investiture, whenceforth the altar will be dedicated, they shall bring their sin-offerings and their guilt-offerings, and they will attain atonement, for at the time that Israel attains atonement, the House attains atonement.