1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
14:15And it shall be, when thou hearest the sound of marching in the tops of the mulberry-trees, that then thou shalt go out to battle; for God will have gone forth before thee to smite the army of the Philistines.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.