In that day shall thy mouth be opened to him which is escaped,
&c.] And shall freely converse with him about the several facts and circumstances of taking and burning the city and temple, and of the usage of the inhabitants: and thou shalt speak, and be no more dumb;
for from this time to the taking of Jerusalem, which was about eighteen months, the prophet had nothing to say to the people of the Jews, and so was dumb with respect to them; but was employed in prophesying against other nations, as the following chapters show, unto chapter thirty three, in which we have an account of the messenger that escaped to him; but after that his mouth was opened, and he prophesied to them again: and thou shalt be a sign unto them;
as they will then own and acknowledge: and they shall own that I am the Lord;
who have foretold these things, and accomplished them.