M source
HYPOTHETICAL TEXTUAL SOURCE FOR THE GOSPEL OF MATTHEW; MATERIAL OF THE GOSPEL OF MATTHEW THAT IS NEITHER Q SOURCE NOR MARK
Proto-Matthew; 'M' source; M Document; M-Source; M Source
M source, which is sometimes referred to as M document, or simply M, comes from the M in "Matthean material". It is a hypothetical textual source for the Gospel of Matthew.