In the 19th century, New Testament scholars noted that the Gospels of Matthew and Luke, which display similarity in word choice and event placement, share material not found in their generally recognized common source, the Gospel of Mark. Accordingly, some theorized that, independently of one another, the authors used the Gospel of Mark along with a hypothetical second source, dubbed the Q document, when composing their manuscripts. What is the theoretical lost text said to contain? Discuss
Source: The Free Dictionary