Six days later Jesus took Peter and the two brothers, James and John, and led them up a high mountain.
As the men watched, Jesus' appearance changed so that his face shone like the sun, and his clothing became dazzling white.
Suddenly, Moses and Elijah appeared and began talking with Jesus.
Peter blurted out, "Lord, this is wonderful! If you want me to, I'll make three shrines, one for you, one for Moses, and one for Elijah."
References for Matthew 17:4
But even as he said it, a bright cloud came over them, and a voice from the cloud said, "This is my beloved Son, and I am fully pleased with him. Listen to him."