Third Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
20:23servi vero regis Syriae dixerunt ei dii montium sunt dii eorum ideo superaverunt nos sed melius est ut pugnemus contra eos in campestribus et obtinebimus eos
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.