Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
20:15et ait adtendite omnis Iuda et qui habitatis Hierusalem et tu rex Iosaphat haec dicit Dominus vobis nolite timere nec paveatis hanc multitudinem non est enim vestra pugna sed Dei
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.