Psalms (Author Moses, David, Solomon, Asaph, Heman, Ethan, sons of Korah, compiled by Ezra)
Chapter 89
3I have made a covenant with my chosen, I have sworn unto David my servant,4Thy seed will I establish for ever, and build up thy throne to all generations. Selah.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.