Ezra 6:18-20

New Catholic Bible

¹⁸ Then they installed the priests in their divisions and the Levites in their divisions for the service of God in Jerusalem, as prescribed in the Book of Moses.

¹⁹ The Passover. The exiles celebrated the Passover on the fourteenth day of the first month. ²⁰ For both the priests and the Levites had purified themselves, and they were all ceremonially clean. The Levites sacrificed the Passover lamb for all the exiles who had returned, for their brothers the priests, and for themselves.