2 Chronicles 30:1-3

King James Version

30 And Hezekiah sent to all Israel and Judah, and wrote letters also to Ephraim and Manasseh, that they should come to the house of the Lord at Jerusalem, to keep the passover unto the Lord God of Israel.

² For the king had taken counsel, and his princes, and all the congregation in Jerusalem, to keep the passover in the second month.

³ For they could not keep it at that time, because the priests had not sanctified themselves sufficiently, neither had the people gathered themselves together to Jerusalem.