Luke 9:36 KJV
And when the voice was past, Jesus was found alone. And they kept it close, and told no man in those days any of those things which they had seen.
Luke 9:36, King James Version
In context
35 And there came a voice out of the cloud, saying, This is my beloved Son: hear him.
36 And when the voice was past, Jesus was found alone. And they kept it close, and told no man in those days any of those things which they had seen.
37 And it came to pass, that on the next day, when they were come down from the hill, much people met him.