Ezra 6:20-21

20Since the priests and Levites had cleansed themselves, all of them were ⌞now⌟ clean. They killed the Passover lambs for all the people who had returned from exile, for the rest of the priests, and for themselves.

21The lambs were eaten by the Israelites who had returned from exile and by all who had separated themselves from the unclean practices of the non-Jews in the land to worship the Lord God of Israel.