2 Chronicles 35:2-6

2And he set the priests in their duties and encouraged them for the service of the house of the Lord.

3Then he said to the Levites who taught all Israel, who were holy to the Lord: “Put the holy ark in the house which Solomon the son of David, king of Israel, built. It shall no longer be a burden on your shoulders. Now serve the Lord your God and His people Israel.

4Prepare yourselves according to your fathers’ houses, according to your divisions, following the written instruction of David king of Israel and the written instruction of Solomon his son.

5And stand in the holy place according to the divisions of the fathers’ houses of your brethren the lay people, and according to the division of the father’s house of the Levites.

6So slaughter the Passover offerings, consecrate yourselves, and prepare them for your brethren, that they may do according to the word of the Lord by the hand of Moses.”