Ezra 6:18-20

New International Version - UK

¹⁸ And they installed the priests in their divisions and the Levites in their groups for the service of God at Jerusalem, according to what is written in the Book of Moses.

The Passover

¹⁹ On the fourteenth day of the first month, the exiles celebrated the Passover. ²⁰ The priests and Levites had purified themselves and were all ceremonially clean. The Levites slaughtered the Passover lamb for all the exiles, for their relatives the priests and for themselves.