'Dumb' in the Bible

But when he did come out, he was unable to speak to them. They realized that he had seen a vision in the temple; and he kept making signs to them, and remained mute.

And [at another time] Jesus was casting out a demon, and it was [controlling a man so as to make him] mute; when the demon had gone out, the mute man spoke. And the crowds were awed.