First Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
12:32de filiis quoque Isachar viri eruditi qui norant singula tempora ad praecipiendum quid facere deberet Israhel principes ducenti omnis autem reliqua tribus eorum consilium sequebatur
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.