2 Chronicles 35:4-6

35:4 Prepare yourselves by your families according to your divisions, as instructed by King David of Israel and his son Solomon. 35:5 Stand in the sanctuary and, together with the Levites, represent the family divisions of your countrymen. 35:6 Slaughter the Passover lambs, consecrate yourselves, and make preparations for your countrymen to do what the Lord commanded through Moses.”