Matthew, Mark and Luke each describe an episode in which Jesus took three of his closest disciples, Peter, James and John, up a mountain, traditionally identified as Mount Tabor though the Gospels themselves do not name it, where his appearance was transformed before them, his face and clothing described as shining with dazzling light. The two great figures of Hebrew Bible tradition, Moses, representing the Law, and Elijah, representing the Prophets, appeared alongside him, speaking with him, before a cloud overshadowed the scene and a voice from within it declared Jesus to be God's beloved son, closely echoing the words spoken at his baptism.
Peter's response, an offer to build three shelters for Jesus, Moses and Elijah, is presented in the Synoptic accounts as a well meaning but confused reaction to an overwhelming experience, and all three Gospels note that the disciples were instructed afterward not to speak of what they had seen until after Jesus's resurrection.
The episode occupies a structurally significant position in each Synoptic Gospel, occurring roughly midway through the narrative, shortly after Peter's confession that Jesus is the Messiah and shortly before Jesus's decisive turn toward Jerusalem and the events leading to his crucifixion.