Luke 9:28-31

28Now about eight days after these sayings, Jesus took with him Peter, John, and James, and went up the mountain to pray.

29As he was praying, the appearance of his face was transformed, and his clothes became very bright, a brilliant white.

30Then two men, Moses and Elijah, began talking with him.

31They appeared in glorious splendor and spoke about his departure that he was about to carry out at Jerusalem.