2 Chronicles 30:13-19

Now many people were gathered at Jerusalem to celebrate the Feast of Unleavened Bread in the second month, a very large assembly. They arose and removed the altars which were in Jerusalem; they also removed all the incense altars and cast them into the brook Kidron. Then they slaughtered the Passover lambs on the fourteenth of the second month. And the priests and Levites were ashamed of themselves, and consecrated themselves and brought burnt offerings to the house of the LORD. They stood at their stations after their custom, according to the law of Moses the man of God; the priests sprinkled the blood which they received from the hand of the Levites. For there were many in the assembly who had not consecrated themselves; therefore, the Levites were over the slaughter of the Passover lambs for everyone who was unclean, in order to consecrate them to the LORD. For a multitude of the people, even many from Ephraim and Manasseh, Issachar and Zebulun, had not purified themselves, yet they ate the Passover otherwise than prescribed. For Hezekiah prayed for them, saying, “May the good LORD pardon everyone who prepares his heart to seek God, the LORD God of his fathers, though not according to the purification rules of the sanctuary.”