Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
Chapter 36
21et conpleretur sermo Domini ex ore Hieremiae et celebraret terra sabbata sua cunctis enim diebus desolationis egit sabbatum usque dum conplerentur septuaginta anni
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.