Cyril of Alexandria
Catena Aurea · Lukasevangelium 9
But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him. And it came to pass, as they departed from him, Peter said unto Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias: not knowing what he said. While he thus spake, there came a cloud, and overshadowed them: and they feared as they entered into the cloud. And there came a voice out of the cloud, saying, This is my beloved Son: hear him. And when the voice was past, Jesus was found alone. And they kept it close, and told no man in those days any of those things which they had seen.
(in Thes. lib. 12. c. 14.) How then should men suppose Him who is really the Son to be made or created, when God the Father thundered from above, This is my beloved Son! as if He said, Not one of My sons, but He who is truly and by nature My Son, according to whose example the others are adopted, He ordered them then to obey Him, when He added, Hear ye him. And to obey Him more than Moses and Elias, for Christ is the end of the Law and the Prophets. Hence the Evangelist adds significantly, And when the voice was past, Jesus was found alone.