'Speechless' in the Bible

Moreover, He said to me, “Son of man, behold (listen carefully), I am going to break the staff of bread [that supports life] in Jerusalem; and they shall eat bread [rationed] by weight and [eat it] with anxiety and fear, and drink water by measure and [drink it] in horror [of the impending starvation],

On that day your mouth will be opened to him who escaped, and you will speak and no longer be mute. In this way you shall be a sign to them, and they will know [without any doubt] that I am the Lord.’”