2 Chronicles 30:16-18

16And they stood in their place after their custom, according to the law of Moses the man of 1God: the priests sprinkled the blood [receiving it] from the hand of the Levites.

17For there were many in the congregation that were not hallowed; therefore the Levites had the charge of the slaughtering of the passover-lambs for every one not clean, to hallow them unto Jehovah.

18For a multitude of the people, many of Ephraim and Manasseh, Issachar and Zebulun, had not cleansed themselves, and they ate the passover otherwise than it was written. But Hezekiah prayed for them saying, Jehovah, who is good, forgive every one