2 Chronicles 30:1-3

1Hezekiah sent word to all Israel and Judah and also wrote letters to Ephraim and Manasseh, inviting them to come to the temple of the Lord in Jerusalem and celebrate the Passover to the Lord, the God of Israel. 2The king and his officials and the whole assembly in Jerusalem decided to celebrate the Passover in the second month. 3They had not been able to celebrate it at the regular time because not enough priests had consecrated themselves and the people had not assembled in Jerusalem.