2 Peter 1.16-end

For we did not follow cleverly devised stories when we told you about the coming of our Lord Jesus Christ in power, but we were eyewitnesses of his majesty. 17 He received honor and glory from God the Father when the voice came to him from the Majestic Glory, saying, “This is my Son, whom I love; with him I am well pleased.” 18 We ourselves heard this voice that came from heaven when we were with him on the sacred mountain.

19 We also have the prophetic message as something completely reliable, and you will do well to pay attention to it, as to a light shining in a dark place, until the day dawns and the morning star rises in your hearts. 20 Above all, you must understand that no prophecy of Scripture came about by the prophet’s own interpretation of things. 21 For prophecy never had its origin in the human will, but prophets, though human, spoke from God as they were carried along by the Holy Spirit.

Matthew 17.1-9

Six days later, Jesus took with him Peter and James and his brother John and led them up a high mountain, by themselves. 2 And he was transfigured before them, and his face shone like the sun, and his clothes became dazzling white. 3 Suddenly there appeared to them Moses and Elijah, talking with him. 4 Then Peter said to Jesus, ‘Lord, it is good for us to be here; if you wish, I[a] will make three dwellings[b] here, one for you, one for Moses, and one for Elijah.’ 5 While he was still speaking, suddenly a bright cloud overshadowed them, and from the cloud a voice said, ‘This is my Son, the Beloved;[c] with him I am well pleased; listen to him!’ 6 When the disciples heard this, they fell to the ground and were overcome by fear. 7 But Jesus came and touched them, saying, ‘Get up and do not be afraid.’ 8 And when they looked up, they saw no one except Jesus himself alone.

9 As they were coming down the mountain, Jesus ordered them, ‘Tell no one about the vision until after the Son of Man has been raised from the dead.’