Mark 9:2-13

2And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured before them. 3And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them. 4And there appeared unto them Elijah with Moses: and they were talking with Jesus. 5And Peter answered and said to 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 Elijah. 6For he wist not what to say; for they were sore afraid. 7And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him. 8And suddenly, when they had looked round about, they saw no man any more, save Jesus only with themselves. 9And as they came down from the mountain, he charged them that they should tell no man what things they had seen, till the Son of man were risen from the dead. 10And they kept that saying with themselves, questioning one with another what the rising from the dead should mean.

11And they asked him, saying, Why say the scribes that Elijah must first come? 12And he answered and told them, Elijah verily cometh first, and restoreth all things; and how it is written of the Son of man, that he must suffer many things, and be set at nought. 13But I say unto you, That Elijah is indeed come, and they have done unto him whatsoever they listed, as it is written of him.