Which gospel writer used Q?

Answer 1

The authors of Matthew and Luke used the hypothetical sayings document called 'Q' as a major source for the gospels. Q is called a hypothetical document because no copy of it has survived to the present time. However, biblical research has convinced almost all scholars that Q did exist and that it was written over a period, in four phases.

Whenever Matthew and Luke agree with each other on material that is not in Mark, their primary source, the wording in Greek is almost identical, showing that they used a common, written document as a source. However, Q was only a sayings document and does not provide any information about when or where Jesus spoke those words. As a result, the gospel authors had to provide their own, generally quite different contexts for the same parables or sayings. Since the two gospels agree on the sayings, but not the context of those sayings, this is further proof that the authors really did rely on Q.