Ambrose of Milan
Catena Aurea · Lukasevangelium 3
Now in the fifteenth year of the reign of Tiberius Cæsar, Pontius Pilate being governor of Judæa, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of Ituræa and of the region of Trachonitis, and Lysanias the tetrarch of Abilene, Annas and Caiaphas being the High Priests, the word of God came unto John the son of Zacharias in the wilderness.
The Son of God being about to gather together the Church, commences His work in His servant. And so it is well said, The word of the Lord came to John, that the Church should begin not from man, but from the Word. But Luke, in order to declare that John was a prophet, rightly used these few words, The word of the Lord came to him. He adds nothing else, for they need not their own judgment who are filled with the Word of God. By saying this one thing, he has therefore declared all. But Matthew and Mark desired to shew him to be a prophet, by his raiment, his girdle, and his food.