Yes - some simple Googling produced this.
But your quote is totally meaningless unless you provide the section of Mark's gospel where he clearly (bluntly) states that he is quoting from Matthew. I suspect you may be looking for a long time.
Come back to me when you've found it.
Here is the first example. Remember that Matthew and Luke sometimes place their pericopes in a different order, so if Mark is quoting from both, he will have to switch between their orders from time to time.
Matthew 12 ends with Jesus in a house, and his mother and brothers arriving to take charge of him. Mark 3 ends with the same pericope.
Mark follows Matthew in placing the parable of the sower next. Matthew has Jesus coming out of the house and sitting by the lake, and then when crowds gather he teaches from a boat. Mark says the same thing, but doesn't mention the house. Matthew says (13:3), "Then he told them many things in parables, saying..." and he tells the parable of the sower. Mark at this point says, "He taught them many things in parables,
and in his teaching he was saying to them..." (Mk 4:2) So here is Mark stating that he has omitted some of Jesus' teaching.
Luke's account of this event (Lk 8 ) includes only two parables, the sower and the lamp, so we know that Mark is not referring to additional teaching given in Luke. Mark gives these two parables plus the mustard seed and one that Matthew and Luke do not, the parable of the growing seed.
Matthew, however, recounts seven. So the teaching that Mark implies he has omitted must be the other four that are in Matthew. John Chapman (1937) writes, "I had found (apparently) two definite statements by Mark that he had omitted some outdoor parables and indoor explanations." [The second apparent statement is in Mk 4:33, see below.]
Mark omits Matthew's parable of the weeds, which he told outside, and his explanation of this to the disciples, which he told inside the house.
Matthew says while Jesus is still outside, "Jesus spoke all these things to the crowd in parables, he did not say anything to them without using a parable". Matthew then tells us Jesus went back inside and carried on teaching. Mark, however, says, "
With many similar parables Jesus spoke the word to them, as much as they could understand. He did not say anything to them without using a parable. But when he was alone with his own disciples, he explained everything". (4:33-34)
Mark then switches back to Luke's sequence which he follows: the calming of the storm, and healing of the demoniac, dead girl and sick woman.
Hope that's fairly clear. The point here is that Mark somehow knew of the additional teaching which he implies Jesus gave on this particular occasion. It seems quite a stretch to assume that Mark mentioned these other parables, and Matthew came along later and decided to add them. The fact that Mark bookends the section with a reference to additional parables at the start and the finish, suggests that he is quoting from previous material. These references could even be, literally, quotation marks!