Luke 1:20-22

20and behold, thou shalt be silent and not able to speak, till the day in which these things shall take place, because thou hast not believed my words, the which shall be fulfilled in their time.

21And the people were awaiting Zacharias, and they wondered at his delaying in the temple.

22But when he came out he could not speak to them, and they recognised that he had seen a vision in the temple. And he was making signs to them, and continued dumb.