1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
17:24and let it be stedfast, and Thy name is great unto the age, saying, Jehovah of Hosts, God of Israel, is God to Israel, and the house of Thy servant David is established before Thee;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.