First Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
25:6universi sub manu patris sui ad cantandum in templo Domini distributi erant in cymbalis et psalteriis et citharis in ministeria domus Domini iuxta regem Asaph videlicet et Idithun et Heman
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.