Luke 9:28-33

²⁸Now about eight days after these words, it happened that He took along Peter and John and James and went up on the mountain to pray.

²⁹And as He prayed, the appearance of His face became different, and His clothing dazzling white.

³⁰And then, two men started talking with Him, who were Moses and Elijah;

³¹they appeared in glory and were explaining His ‘departure’, that He was about to bring to fruition in Jerusalem.

³²Now Peter and those with him were heavy with sleep; but becoming fully awake, they saw His glory, and the two men who stood with Him.

³³Then it happened: as they were parting from Him, Peter said to Jesus: “Master, it is good for us to be here” and “Should we make three shelters: one for you, and one for Moses, and one for Elijah?”—not knowing what he was saying.