Luke 9:34-36

ISV(i) 34 But while he was saying this, a cloud appeared and surrounded them, and they became terrified as they were being overshadowed by the cloud.
35 Then a voice came out of the cloud and said, “This is my Son, whom I have chosen. Keep listening to him!” 36 After the voice had spoken, Jesus was alone. The disciples kept silent and at that time told no one about what they had seen.