I would be very happy if the great Rabbi Shlita would answer us…

"And they shall bring to you a pure cow" (19:2), and below (verse 22) Rashi brought from the foundation of Rabbi Moshe the preacher, a red cow, a parable of the son of a slave girl who had defiled a king's palace, they said, "His mother will come and wipe the dung, so a cow will come and atone for the calf." And here is the MOK (28:1, quoted in Rashi below 20:1) So, why was the parshat of Miriam's death based on the parshat of the red cow, to tell you what a red cow atones for, even the death of the righteous atones for.
And the Tossaurus explained (ibid. 55), a red heifer atones for the act of the calf, and as we read in the Midrash, the Parable of the Slave Woman Who Was Deflowered, etc., v. 11, why is it that the divination (Yoma 2) reads, "When He did on this day what the Lord commanded to be done to make atonement for you," the high priest on Yom Kippur and the priest who burns the heifer separate them seven days before the tabernacle in the Temple, and it was said in the Book of Solomon in the Book of the Law that the heifer was not blemished, for the atonement is written, and the heifer is not a daughter of atonement, then it is clear that a heifer does not come to make atonement, and 33.
Ita Begitin (S.), eight parshas were recited on the day the tabernacle was erected, etc., and the parshas of the red cow. And the interpretation is that on the next day the cow was burned so that those who were cleansed would be purified before their entrances, Ayish. And it must be understood, what reason did Rashi take that they were purified specifically for their Passovers, is that it was provided for because of the purity of the Levites, as it is written in the Korah (Numbers 8:7): "This is upon them who sinned." And Rashi examined the parshas of Nasa (7:1, i.e. on the day of Moses' wedding), which was written, and it was the first day of the month of Nisan, on the second the cow was burned, on the third this is the first defilement, and on the seventh they shaved.
It is found in the 7th chapter that this was the case with the Levites long before the celebration of Passover. And so again, why did Rashi choose Passover? [And was the parashat Tumat Mat recited before the parashat Para Aduma was recited, and see in the Sukkah (25:25), and in the novellas of Maran Riza HaLevi in ​​the parashat Bah'alotach, and in the Midrash Tanhuma Hokat (end of 30:6). and in the 7th chapter].