1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
Chapter 17
24Let it even be established, that thy name may be magnified for ever, saying, The LORD of hosts is the God of Israel, even a God to Israel: and let the house of David thy servant be established before thee.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.