Bede, on 1Pet 5:13

“The church that is in Babylon, elected together with you, saluteth you: and so doth my son Mark.”

“The Church which is gathered in Babylon greets you, etc. He calls Rome Babylon figuratively, evidently because of the confusion of manifold idolatry. In the midst of which, the holy Church, now immature and very small, was shining forth, in the example of the Israelite people who once, small in number and captured, sitting by the rivers of Babylon, wept for the absence of the holy land, nor could they sing the Lord's song in a foreign land (Psalm 136). And blessed Peter appropriately, while exhorting his listeners to endure present adversities, mentions the Church which is established with him in Babylon, that is, in the confusion of tribulations. And yet, he confirms it to be gathered, to show that the holy city of God in this life cannot be free from the intermingling and oppression of the city of the devil, which Babylon signifies. He calls Mark his son, who is said to become his son through baptism. Hence it is clear that before he sent Mark from Rome to Alexandria to preach the gospel, he wrote this Epistle. In the time of Emperor Claudius, both Peter and Mark came to Rome, and Mark himself, after composing his Gospel in Rome, was sent to Alexandria. Whence it is inferred that when Peter sought a place and time to write this Epistle, the place was Rome, the time was during the reign of Claudius Caesar.”

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