1 Peter 5:13

13That is at Babylon Many of the ancients thought that Rome is here enigmatically denoted. This comment the Papists gladly lay hold on, that Peter may appear to have presided over the Church of Rome: nor does the infamy of the name deter them, provided they can pretend to the title of an apostolic seat; nor do they care for Christ, provided Peter be left to them. Moreover, let them only retain the name of Peter’s chair, and they will not refuse to set Rome in the infernal regions. But this old comment has no color of truth in its favor; nor do I see why it was approved by Eusebius and others, except that they were already led astray by that error, that Peter had been at Rome. Besides, they are inconsistent with themselves. They say that Mark died at Alexandria, in the eighth year of Nero; but they imagine that Peter, six years after this, was put to death at Rome by Nero. If Mark formed, as they say, the Alexandrian Church, and had been long a bishop there, he could never have been at Rome with Peter. For Eusebius and Jerome extend the time of Peter’s presidency at Rome to twenty-five years; but this may be easily disproved by what is said in Galatians 1:0 and Galatians 2:0 chapter of the Epistle to the Galatians.

Since, then, Peter had Mark as his companion when he wrote this Epistle, it is very probable that he was at Babylon: and this was in accordance with his calling; for we know that he was appointed an apostle especially to the Jews. He therefore visited chiefly those parts where there was the greatest number of that nation.

In saying that the Church there was a partaker of the same election, his object was to confirm others more and more in the faith; for it was a great matter that the Jews were gathered into the Church, in so remote a part of the world.

My son So he calls Mark for honor’s sake; the reason, however, is, because he had begotten him in the faith, as Paul did Timothy.