Theophylact of Ohrid — as excerpted in the Catena Aurea on John 21:19-23

“Some have understood, Till I come, to mean, Till I come to punish the Jews who have crucified Me, and strike them with the Roman rod. For they say that this Apostle lived up to the time of Vespasian, who took Jerusalem, and dwelt near when it was taken. Or, Till I come, i. e. till I give him the commission to preach, for to you I commit now the pontificate of the world: and in this follow Me, but let him remain till I come and call him, as I do thee now.”