Matthew 17:1-3

Six days later Jesus took with Him Peter and James and John the brother of James, and led them up on a high mountain by themselves. [Mark 9:2-8; Luke 9:28-36] And His appearance changed dramatically in their presence; and His face shone [with heavenly glory, clear and bright] like the sun, and His clothing became as white as light. And behold, Moses and Elijah appeared to them, talking with Jesus.