THE HOLY BIBLE Authorized King James
Psalms (Author Moses, David, Solomon, Asaph, Heman, Ethan, sons of Korah, compiled by Ezra)
110:4The LORD hath sworn, and will not repent, Thou art a priest for ever after the order of Melchizedek.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.