2 Chronicles 30:17-20

For there were many in the assembly who had not consecrated themselves [that is, become ceremonially clean and free from all sin]; so the Levites had to slaughter the Passover lambs for everyone who was not clean, in order to make them holy for the LORD. For the majority of the people, many from Ephraim and Manasseh, Issachar and Zebulun, had not purified themselves, and yet they ate the Passover contrary to what had been prescribed. For Hezekiah had prayed for them, saying, “May the good LORD pardon everyone who sets his heart to seek God—the LORD God of his fathers—even though it is not in accordance with the [ceremonial] purification [rules] of the sanctuary.” So the LORD listened to Hezekiah and healed the people [of their uncleanness].