What is the significance of the first bull that they brought to purify the Levi'im, as an Olah?
Rashi: A bull is the Korban that the Tzibur brings to atone for Avodah-Zarah. 1
And why does the Torah add the word "Sheini"?
Rashi: To teach us that, like the Olah, it was not to be eaten. 1
In spite of the fact that it was a Chatas Chitzonah (whose blood was sprinkled on the Mizbe'ach ha'Olah).
Why was the Chatas not eaten?