2 Chronicles 30:21-23

The Israelites who were present in Jerusalem celebrated the Feast of Unleavened Bread for seven days with great joy. The Levites and priests praised the LORD day after day, singing to the LORD with loud instruments. Hezekiah spoke encouragingly to all the Levites who showed good understanding in the things of the LORD. So the people 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] for another seven days; and they celebrated it another seven days with joy.