Ezra 6:20

For the priests and the Levites were purified together, all of them were pure,.... They were all to a man pure, and all purified as one man; all were of one mind to purify themselves, and took care to do it, and did it with as much dispatch as if only one man was purified; so that they were more generally prepared for service now than in the times of Hezekiah, 2 Chronicles 29:34

and killed the passover for all the children of the captivity, and for their brethren the priests and for themselves; which seems to have been done by the Levites, for themselves and for the priests, and for all the people, who were not so pure as the priests and Levites; or otherwise they might have killed it themselves, Exodus 12:6, as Bochart n thinks.

n Hierozoic. par. 1. l. 2. c. 50. col. 576.