2 Chronicles 30:15-18

15And they slaughtered the Passover lamb on the fourteenth day of the second month. And the priests and the Levites were ashamed, so that they consecrated themselves and brought burnt offerings into the house of the LORD. 16They took their accustomed posts according to the Law of Moses the man of God. The priests threw the blood that they received from the hand of the Levites. 17For there were many in the assembly who had not consecrated themselves. Therefore the Levites had to slaughter the Passover lamb for everyone who was not clean, to consecrate it to the LORD. 18For a majority of the people, many of them from Ephraim, Manasseh, Issachar, and Zebulun, had not cleansed themselves, yet they ate the Passover otherwise than as prescribed. For Hezekiah had prayed for them, saying, “May the good LORD pardon everyone