“And Jesus went about all the cities and villages, teaching in their synagogues, and preaching the gospel of the kingdom, and healing every sickness and every disease among the people.”
Matthew 9:35 — Greek Interlinear
Church Fathers on Matthew 9:35
Observe the beautiful order of His miracles; how after He had given sight to the blind, He restored speech to the dumb, and healed the possessed of the daemon; by which He shews Himself the Lord of power, and the author of the heavenly medicine. For it was said by Isaiah, 'Then shall the eyes of the blind be opened, the ears of the deaf shall be unstopped, and the tongue of the dumb loosed.' [Isa 35:6]
The Greek word here is more frequent in common speech in the sense of, 'deaf,' but it is the manner of Scripture to use it indifferently as either.
This was not a mere natural defect; but was from the malignity of the daemon; and therefore he needed to be brought of others, for he could not ask any thing of others as living without voice, and the daemon chaining his spirit together with his tongue. Therefore Christ does not require faith of him, but immediately healed his disorder; as it follows, 'And when the daemon was cast out, the dumb spake.'