Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
29:30praecepitque Ezechias et principes Levitis ut laudarent Dominum sermonibus David et Asaph videntis qui laudaverunt eum magna laetitia et curvato genu adoraverunt
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.