Luke 9:30-33

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

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

³²Now 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.

³³And 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.