וְכֵ֤ן תַּֽעֲשֶׂה֙ בְּשִׁבְעָ֣ה בַחֹ֔דֶשׁ מֵאִ֥ישׁ שֹׁגֶ֖ה וּמִפֶּ֑תִי וְכִפַּרְתֶּ֖ם אֶת־הַבָּֽיִת׃
At ganito rin ang gagawin mo sa ikapitong araw ng buwan, para sa taong nagkasala nang hindi sinasadya at para sa taong walang-muwang; at sa gayon ay magbabayad-sala kayo para sa Bahay.
Tze'enah Ure'enah
“You shall do the same on the seventh day of the month” [45:20]. Furthermore, they should take sacrifices on the seventh day of the month of Nisan. This was done because there were Israelites who were happy that they began to bring sacrifices on the first day of the month of Nisan and out of great joy some Israelites went into the interior of the Temple where they were not supposed to go. They were foolish and they were not afraid to enter. Therefore, they should bring sacrifices to atone for these people. On the fourteenth day of Nisan you should bring the Paschal sacrifice and you should eat unleavened bread for seven days.1Radak, Ezekiel, 45:20.
Rashi
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.
Rashi
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.