2nd Chronicles 30:20

17 for many [are] in the assembly who have not sanctified themselves, and the Levites [are] over the slaughtering of the passover-offerings for every one not clean, to sanctify [him] to Jehovah:

18 for a multitude of the people, many from Ephraim and Manasseh, Issachar, and Zebulun, have not been cleansed, but have eaten the passover otherwise than it is written; but Hezekiah prayed for them, saying, `Jehovah, who [is] good, doth receive atonement for every one

19 who hath prepared his heart to seek God -- Jehovah, God of his fathers -- yet not according to the cleansing of the sanctuary;`

20 and Jehovah hearkeneth unto Hezekiah, and healeth the people.

21 And the sons of Israel, those found in Jerusalem, make the feast of unleavened things seven days with great joy; and giving praise to Jehovah day by day are the Levites and the priests, with instruments of praise before Jehovah.

22 And Hezekiah speaketh unto the heart of all the Levites, those giving good understanding concerning Jehovah, and they eat the appointed thing seven days; sacrificing sacrifices of peace-offerings, and making confession to Jehovah, God of their fathers.

23 And all the assembly take counsel to keep other seven days, and they keep seven days [with] joy;