2 Chronicles 30:13-19

And there assembled at Jerusalem much people to keep the feast of unleavened bread in the second month, a very great assembly. And they arose and took away the altars that were in Jerusalem, and all the altars for incense took they away, and cast them into the brook Kidron. Then they killed the passover on the fourteenth day of the second month: and the priests and the Levites were ashamed, and sanctified themselves, and brought burnt-offerings into the house of Jehovah. And they stood in their place after their order, according to the law of Moses the man of God: the priests sprinkled the blood which they received of the hand of the Levites. For there were many in the assembly that had not sanctified themselves: therefore the Levites had the charge of killing the passovers for every one that was not clean, to sanctify them unto Jehovah. For a multitude of the people, even many of Ephraim and Manasseh, Issachar and Zebulun, had not cleansed themselves, yet did they eat the passover otherwise than it is written. For Hezekiah had prayed for them, saying, The good Jehovah pardon every one that setteth his heart to seek God, Jehovah, the God of his fathers, though he be not cleansed according to the purification of the sanctuary.