According to Luke, when Moses and Elijah appeared during the Transfiguration, they spoke of Jesus'
Answer Details
According to the Gospel of Luke, when Moses and Elijah appeared during the Transfiguration, they spoke with Jesus about His "departure", which is referring to His impending death. This event is recorded in Luke 9:28-36, and it is described that Moses and Elijah appeared in glorious form and talked with Jesus about what He was about to accomplish in Jerusalem. This conversation likely included the upcoming events of Jesus' trial, crucifixion, and resurrection. The Transfiguration served as a confirmation of Jesus' divine identity and His mission on earth, which was to suffer and die for the sins of humanity.