Mark 9:7
And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him.
And there was a cloud that overshadowed them,.... Jesus, Moses, and Elias, and also the disciples; who, according to Luke, entered into it, and so were covered by it.
and a voice came out the cloud, saying, this is my beloved Son, hear him. This was the voice of God the Father, bearing a testimony to the sonship of Christ; and was directed, not to Moses and Elias, but to the disciples, enjoining them to hear and obey him, who was the end of the law and prophets; was the great prophet Moses had spoken of, and was to be hearkened to, and whom all the prophets had testified of, and in whom they all centred; See Gill on "Matthew 17:5".