Ambrose of Milan
Catena Aurea · Lukasevangelium 1
And it came to pass, that on the eighth day they came to circumcise the child; and they called him Zacharias, after the name of his father. And his mother answered and said, Not so; but he shall be called John. And they said unto her, There is none of thy kindred that is called by this name. And they made signs to his father, how he would have him called. And he asked for a writing table, and wrote, saying, His name is John. And they marvelled all. And his mouth was opened immediately, and his tongue loosed, and he spake, and praised God.
Rightly also, from that moment was his tongue loosed, for that which unbelief had bound, faith set free. Let us then also believe, in order that our tongue, which has been bound by the chains of unbelief, may be loosed by the voice of reason. Let us write mysteries by the Spirit if we wish to speak. Let us write the forerunner of Christ, not on tables of stone, but on the fleshly tablets of the heart. For he who names John, prophesies Christ. For it follows, And he spake, giving thanks.