Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
18:5congregavitque rex Israhel prophetarum quadringentos viros et dixit ad eos in Ramoth Galaad ad bellandum ire debemus an quiescere at illi ascende inquiunt et tradet Deus in manu regis
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.