2 Chronicles 30:17-20

Since many of the people had not purified themselves, the Levites had to slaughter their Passover lamb for them, to set them apart for the LORD. Most of those who came from Ephraim, Manasseh, Issachar, and Zebulun had not purified themselves. But King Hezekiah prayed for them, and they were allowed to eat the Passover meal anyway, even though this was contrary to the requirements of the Law. For Hezekiah said, “May the LORD, who is good, pardon those who decide to follow the LORD, the God of their ancestors, even though they are not properly cleansed for the ceremony.” And the LORD listened to Hezekiah’s prayer and healed the people.