Mark 9:2-7

And after six days Jesus taketh with him Peter, and James, and John, and bringeth them up into a high mountain apart by themselves: and he was transfigured before them; and his garments became glistering, exceeding white, so as no fuller on earth can whiten them. And there appeared unto them Elijah with Moses: and they were talking with Jesus. And Peter answereth and saith to Jesus, Rabbi, 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. For he knew not what to answer; for they became sore afraid. And there came a cloud overshadowing them: and there came a voice out of the cloud, This is my beloved Son: hear ye him.