Moreover Hezekiah the king and the princes commanded the Levites to sing praise unto the LORD with the words of David, and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshipped.
Hezekiah, the king, and the leaders told the musicians to sing happily about God using words from David and Asaph. The musicians sang and worshipped with respect.