Augustine of Hippo, on Ps 114:10

“The same angel came to Mary, announcing that Christ would be born of her in the flesh, and Mary says something similar. For he had said: By what means shall I know this? For I am old, and my wife is advanced in her days. And it is said to him: Behold, you will be silent and unable to speak until the day these things are fulfilled, because you did not believe my words. And he subjected to the punishment of silence, deservedly for his lack of faith. What did the prophet say about John? The voice of one crying in the wilderness. Zacharias is silent while generating the voice. Because he did not believe, he was silent: deservedly he was rendered mute until the voice was born. For if it was rightly said, indeed because it was rightly said in the holy psalm: I believed, therefore have I spoken: because he did not believe, deservedly he did not speak.”

Imported from an open dataset — not yet checked against the printed edition.