2 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
31:17and the genealogy of the priests by the house of their fathers, and of the Levites, from a son of twenty years and upward, in their charges, in their courses;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.