Adam Clarke on Matthew 9:33

And when the devil was cast out, the dumb spake - The very miracle which was now wrought was to be the demonstrative proof of the Messiah's being manifested in the flesh. See Isa 35:5, Isa 35:6.

It was never so seen in Israel - The greatest of the prophets has never been able to do such miracles as these. This was the remark of the people; and thus we find that the poor and the simple were more ready to acknowledge the hand of God than the rich and the learned. Many miracles had been wrought in the course of this one day, and this excited their surprise.