2 Chronicles 30:15-17

15On the 14th day of the second month, they killed the lamb for the Passover feast. The priests and the Levites who were not yet clean became ashamed. So they made themselves clean to serve the Lord. Then they could bring burnt offerings to the Lord's temple.

16They stood in their proper places. God's servant Moses had written in God's law where they should stand. The Levites gave the blood from the sacrifices to the priests. The priests then splashed the blood on the altar.

17Many of the people had not made themselves properly clean. So they could not kill their lambs for the Passover and offer them to the Lord. The Levites had to kill the lambs for those people instead.