Six days later Jesus took with him Peter and the brothers James and John and led them up a high mountain where they were alone.
As they looked on, a change came over Jesus: his face was shining like the sun, and his clothes were dazzling white.
Then the three disciples saw Moses and Elijah talking with Jesus.
So Peter spoke up and said to Jesus, "Lord, how good it is that we are here! If you wish, I will make three tents here, one for you, one for Moses, and one for Elijah."
While he was talking, a shining cloud came over them, and a voice from the cloud said, "This is my own dear Son, with whom I am pleased - listen to him!" 1
References for Matthew 17:5
17.5 a Gn 22.2; Ps 2.7; Is 42.1; Mt 3.17; 12.18; Mk 1.11; Lk 3.22; b Dt 18.15.+O+N17.1-5 2 P 1.17, 18.