2 Chronicles 30:21-23

The sons of Israel present in Jerusalem celebrated the Feast of Unleavened Bread for seven days with great joy, and the Levites and the priests praised the LORD day after day with loud instruments to the LORD. Then Hezekiah spoke encouragingly to all the Levites who showed good insight in the things of the LORD. So they ate for the appointed seven days, sacrificing peace offerings and giving thanks to the LORD God of their fathers. Then the whole assembly decided to celebrate the feast another seven days, so they celebrated the seven days with joy.