As they went out, behold, they brought to him a dumb man possessed with a demon.
All Commentaries on Matthew 9:32 Go To Matthew 9
Theophylact of Ochrid
AD 1107
The disease was not a natural one, but from the demon. This is why others brought him forward. He himself was not able to call upon Jesus, as the demon had bound his tongue. Therefore Jesus does not require faith of him, but immediately heals him by casting out the demon which had prevented his speech.