Ezra 6:20-21

20The priests and Levites had all made themselves clean for their special work. The Levites killed the lambs for the Passover sacrifice. They did that on behalf of all the people, the priests and themselves.

21So all the people who had returned from Babylon ate the feast. Other Israelites in Jerusalem had turned away from the bad things that other nations who lived there did. They had decided to worship the Lord, Israel's God. So they also ate the feast.