30:3 They were unable to observe it at the regular time because not enough priests had consecrated themselves and the people had not assembled in Jerusalem.
2 Chronicles 12:5
12:5 Shemaiah the prophet visited Rehoboam and the leaders of Judah who were assembled in Jerusalem because of Shishak. He said to them, “This is what the Lord says: ‘You have rejected me, so I have rejected you and will hand you over to Shishak.’”