Exodus 24:15

And Moses goeth up unto the mount, and the cloud covereth the mount;

Exodus 19:9

And Jehovah saith unto Moses, 'Lo, I am coming unto thee in the thickness of the cloud, so that the people hear in My speaking with thee, and also believe in thee to the age;' and Moses declareth the words of the people unto Jehovah.

Exodus 19:16

And it cometh to pass, on the third day, while it is morning, that there are voices, and lightnings, and a heavy cloud, on the mount, and the sound of a trumpet very strong; and all the people who are in the camp do tremble.

Matthew 17:5

While he is yet speaking, lo, a bright cloud overshadowed them, and lo, a voice out of the cloud, saying, 'This is My Son, -- the Beloved, in whom I did delight; hear him.'

2 Chronicles 6:1

Then said Solomon, 'Jehovah said -- to dwell in thick darkness,

Treasury of Scripture Knowledge

Summary

And Moses went up into the mount, and a cloud covered the mount.

General references

Bible References

A cloud

Exodus 19:9
And Jehovah saith unto Moses, 'Lo, I am coming unto thee in the thickness of the cloud, so that the people hear in My speaking with thee, and also believe in thee to the age;' and Moses declareth the words of the people unto Jehovah.
2 Chronicles 6:1
Then said Solomon, 'Jehovah said -- to dwell in thick darkness,
Matthew 17:5
While he is yet speaking, lo, a bright cloud overshadowed them, and lo, a voice out of the cloud, saying, 'This is My Son, -- the Beloved, in whom I did delight; hear him.'

General references

Exodus 24:2
and Moses hath drawn nigh by himself unto Jehovah; and they draw not nigh, and the people go not up with him.