https://www.btstories.com/transfiguration/

Jesus took Peter, James, and John and went up on a mountain to pray. As the Lord prayed, the three disciples fell asleep. Suddenly they woke up and saw the face of Jesus becoming brighter and brighter. His clothes were a brilliant white and shone like light.

Then they realized that two men were with him, and they knew it was Moses and Elijah. They also shone like the sun. Moses and Elijah talked with Jesus about his death.