Luke 9:35 (KJV)

And, behold, there talked with him two men, which were Moses and Elias:

Who appeared in glory, and spake of his decease which he should accomplish at Jerusalem.

But Peter and they that were with him were heavy with sleep: and when they were awake, they saw his glory, and the two men that stood with him.

And it came to pass, as they departed from him, Peter said unto Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias: not knowing what he said.

While he thus spake, there came a cloud, and overshadowed them: and they feared as they entered into the cloud.

And when the voice was past, Jesus was found alone. And they kept it close, and told no man in those days any of those things which they had seen.

And it came to pass, that on the next day, when they were come down from the hill, much people met him.

And, behold, a man of the company cried out, saying, Master, I beseech thee, look upon my son: for he is mine only child.

And, lo, a spirit taketh him, and he suddenly crieth out; and it teareth him that he foameth again, and bruising him hardly departeth from him.

And I besought thy disciples to cast him out; and they could not.