Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 9:32-36

“But while Peter spake, our Lord builds a tabernacle not made with hands, and enters into it with the Prophets. Hence it is added, While he thus spake there came a cloud and overshadowed them, to shew that He was not inferior to the Father. For as in the Old Testament it was said, the Lord dwelt in the cloud, so now also a cloud received our Lord, not a dark cloud, but bright and shining.”