2 Chronicles 35:2-6

2He appointed the priests to their offices and encouraged them in the service of the house of the Lord.

3And he said to the Levites who taught all Israel and who were holy to the Lord, "Put the holy ark in the house that Solomon the son of David, king of Israel, built. You need not carry it on your shoulders. Now serve the Lord your God and his people Israel.

4Prepare yourselves according to your fathers' houses by your divisions, as prescribed in the writing of David king of Israel and the document of Solomon his son.

5And stand in the Holy Place according to the groupings of the fathers' houses of your brothers the lay people, and according to the division of the Levites by fathers' household.

6And slaughter the Passover lamb, and consecrate yourselves, and prepare for your brothers, to do according to the word of the Lord by Moses."