Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
2:16dixeruntque illi ecce cum servis tuis sunt quinquaginta viri fortes qui possint ire et quaerere dominum tuum ne forte tulerit eum spiritus Domini et proiecerit in uno montium aut in una vallium qui ait nolite mittere
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.