'Dumb' in the Bible

And I will make thy tongue cleave to the roof of thy mouth, that thou shalt be dumb, and shalt not be to them a reprover; for they are a rebellious house.

In that day shall thy mouth be opened to him that is escaped, and thou shalt speak, and be no more dumb. So shalt thou be a sign unto them; and they shall know that I am Jehovah.

Now the hand of Jehovah had been upon me in the evening, before he that had escaped came; and he had opened my mouth against his coming to me in the morning; and my mouth was opened, and I was no more dumb.