Matthew 17:8

And lifting up their eyes, they saw no one except Jesus alone.

Mark 9:8

And suddenly, looking around, they did not see anyone any more, except Jesus alone with themselves.

Luke 9:36

And when the voice occurred, Jesus was found alone. And they were silent, and told no one in those days anything which they had seen.

Acts 12:10-11

When they were past the first and second guard, they came to the iron gate that leads to the city, which opened to them of its own accord. And they went out and passed on through one street. And immediately the angel departed from him.

Treasury of Scripture Knowledge

Summary

And when they had lifted up their eyes, they saw no man, save Jesus only.

Bible References

They saw

Mark 9:8
And suddenly, looking around, they did not see anyone any more, except Jesus alone with themselves.
Luke 9:36
And when the voice occurred, Jesus was found alone. And they were silent, and told no one in those days anything which they had seen.
Acts 12:10
When they were past the first and second guard, they came to the iron gate that leads to the city, which opened to them of its own accord. And they went out and passed on through one street. And immediately the angel departed from him.