2 Chronicles 30:21-23

And the children of Israel that were present at Jerusalem kept the feast of unleavened bread seven days with great gladness: and the Levites and the priests praised the LORD day by day, {singing} with loud instruments unto the LORD. {present: Heb. found} {loud...: Heb. instruments of strength} And Hezekiah spake comfortably unto all the Levites that taught the good knowledge of the LORD: and they did eat throughout the feast seven days, offering peace offerings, and making confession to the LORD God of their fathers. {comfortably...: Heb. to the heart of all} And the whole assembly took counsel to keep other seven days: and they kept {other} seven days with gladness.