1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
15:17And the Levites appoint Heman son of Joel, and of his brethren, Asaph son of Berechiah, and of the sons of Merari their brethren, Ethan son of Kushaiah;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.