Mark 9:8 WEB

⁶  For he didn't know what to say, for they were very afraid.

⁷  A cloud came, overshadowing them, and a voice came out of the cloud, 'This is my beloved Son. Listen to him.'

⁸  Suddenly looking around, they saw no one with them any more, except Jesus only.

⁹  As they were coming down from the mountain, he charged them that they should tell no one what things they had seen, until after the Son of Man had risen from the dead.

¹⁰  They kept this saying to themselves, questioning what the 'rising from the dead' meant.