Matthew 17: 1 - 9
1 And after six days Jesus took with him Peter and James and John his brother, and led them up a high mountain apart.
2 And he was transfigured before them, and his face shone like the sun, and his garments became white as light.
3 And behold, there appeared to them Moses and Eli'jah, talking with him.
4 And Peter said to Jesus, "Lord, it is well that we are here; if you wish, I will make three booths here, one for you and one for Moses and one for Eli'jah."
5 He was still speaking, when lo, a bright cloud overshadowed them, and a voice from the cloud said, "This is my beloved Son, with whom I am well pleased; listen to him."
6 When the disciples heard this, they fell on their faces, and were filled with awe.
7 But Jesus came and touched them, saying, "Rise, and have no fear."
8 And when they lifted up their eyes, they saw no one but Jesus only.
9 And as they were coming down the mountain, Jesus commanded them, "Tell no one the vision, until the Son of man is raised from the dead."

EWTN