Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
6:17cumque orasset Heliseus ait Domine aperi oculos huius ut videat et aperuit Dominus oculos pueri et vidit et ecce mons plenus equorum et curruum igneorum in circuitu Helisei
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.