'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 was escaped came; and he had opened my mouth, until he came to me in the morning; and my mouth was opened, and I was no more dumb.