2 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
36:21to fulfil the word of Jehovah by the mouth of Jeremiah, until the land had enjoyed its sabbaths. All the days of its desolation it kept sabbath, to fulfil seventy years.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.