Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
19:32quam ob rem haec dicit Dominus de rege Assyriorum non ingredietur urbem hanc nec mittet in eam sagittam nec occupabit eam clypeus nec circumdabit eam munitio
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.