Luke 9:34-36

Young's Literal Translation

³⁴ and as he was speaking these things, there came a cloud, and overshadowed them, and they feared in their entering into the cloud,

³⁵ and a voice came out of the cloud saying, `This is My Son -- the Beloved; hear ye him;'

³⁶ and when the voice was past, Jesus was found alone; and they were silent, and declared to no one in those days anything of what they have seen.