2 Chronicles 30:17-20

17For there were many in the congregation 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 the LORD.

18For 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 LORD pardon every one

19that setteth his heart to seek God, the LORD, the God of his fathers, though he be not cleansed according to the purification of the sanctuary.

20And the LORD hearkened to Hezekiah, and healed the people.