Ezra 6:18-20

Darby Translation

¹⁸ And they set the priests in their classes, and the Levites in their divisions, for the service of God, which is at Jerusalem: as it is written in the book of Moses.

¹⁹ And the children of the captivity held the passover upon the fourteenth of the first month.

²⁰ For the priests and the Levites had purified themselves as one [man]: they were all pure; and they killed the passover for all the children of the captivity, and for their brethren the priests, and for themselves.