Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
9:27Ahazias autem rex Iuda videns hoc fugit per viam domus horti persecutusque est eum Hieu et ait etiam hunc percutite in curru suo in ascensu Gaber qui est iuxta Ieblaam qui fugit in Mageddo et mortuus est ibi
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.