Luke 9:30

27 But truly I say to you, Some of those who are here now will have no taste of death till they see the kingdom of God.

28 And about eight days after he had said these things, he took Peter and John and James with him and went up into the mountain for prayer.

29 And while he was in prayer, his face was changed and his clothing became white and shining.

30 And two men, Moses and Elijah, were talking with him;

31 Who were seen in glory and were talking of his death which was about to take place in Jerusalem.

32 Now Peter and those who were with him were overcome with sleep: but when they were fully awake, they saw his glory and the two men who were with him.

33 And when they were about to go away from him, Peter said to Jesus, Master, it is good for us to be here; let us make three tents, one for you and one for Moses and one for Elijah: having no knowledge of what he was saying.