
Ambrose of Milan
Catena Aurea · Lukasevangelium 9
And it came to pass about an eight days after these sayings, he took Peter and John and James, and went up into a mountain to pray. And as he prayed, the fashion of his countenance was altered, and his raiment was white and glistering. And, behold, there talked with him two men, which were Moses and Elias: Who appeared in glory, and spake of his decease which he should accomplish at Jerusalem.
Or, Peter went up, who received the keys of the kingdom of heaven; John, to whom was committed our Lord’s mother; James, who first suffered martyrdom. (Acts 12:1.)