New Testament the Anchor Bible Dictionary), may be the earliest known New Testament canon attributed to mainstream Christianity. It is similar, but not identical, to the modern New Testament canon. The oldest clear endorsement of Matthew, Mark, Luke, and John being the only legitimate gospels was written "circa" 180 AD. A four gospel canon (the "Tetramorph") was asserted by Irenaeus, who refers to it directly in his polemic "Against the Heresies", "It is not possible that the gospels can be either more or fewer in number than they are. For, since there are four zones of the world in which we live,
Jesus in 1 Timothy 3:16) than the canonical gospels do. In the undisputed Pauline letters, which were written earlier than the gospels, the words or instructions of Jesus are cited several times (1 Corinthians 7:10–11, 9:14, 11:23–25, 2 Corinthians 12:9). Some early Christian groups had separate descriptions of the life and teachings of Jesus that are not included in the New Testament. These include the Gospel of Thomas, Gospel of Peter, and Gospel of Judas, the Apocryphon of James, and many other apocryphal writings. Most scholars conclude that these are written much later and are less reliable accounts than the canonical