Warning against the scribes (Luke 20:45). Mt inserts at this point a long and severe discourse against the scribes and Pharisees (Matthew 23:1).
Related Commentaries of Mark 12:38
Mark 12:38-40
38 And he said unto them in his doctrine,Beware of the scribes, which love to go in long clothing, and love salutations in the marketplaces,
39 And the chief seats in the synagogues, and the uppermost rooms at feasts:
40 Which devour widows' houses, and for a pretence make long prayers: these shall receive greater damnation.