Luke 9:36

And in there having been a voice, Jesus was found alone. And they were silent, and announced nothing to any one in those days, of what they had seen.

Matthew 17:9

And they, coming down from the mountain, Jesus charged them, saying, Tell the sight to none, even till the Son of man rises from the dead.

Ecclesiastes 3:7

A time to rend, and a time to sew; a time to be silent, and a time to speak:

Mark 9:6

For he knew not what he said; for they were terrified.

Mark 9:9-10

And they coming down from the mount, he charged them that they recount to none what they saw, except when the Son of man should arise from the dead.

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

And they

Ecclesiastes 3:7
A time to rend, and a time to sew; a time to be silent, and a time to speak:
Matthew 17:9
And they, coming down from the mountain, Jesus charged them, saying, Tell the sight to none, even till the Son of man rises from the dead.
Mark 9:6
For he knew not what he said; for they were terrified.

General references

Mark 9:8
And suddenly, having looked around, they no more saw any one, but Jesus alone with them.