Exodus 24:15

So then Moses wont up into the mountain, - and the cloud covered the mountain.

Exodus 19:9

Then said Yahweh unto Moses: Lo! I, am coming unto thee in the veiling of cloud, in order that the people may hear when I speak with thee, moreover also, that, in thee, they may trust to times age-abiding. Then told Moses the words of the people unto Yahweh.

Exodus 19:16

And it came to pass on the third day, when the morning had come, that there were thunderings and lightnings, and a heavy cloud upon the mount, and the sound of a horn, loud exceedingly, - and all the people who were in the camp trembled.

Matthew 17:5

While yet he was speaking, lo! a brightly shining cloud, overshadowed them, and lo! a voice, out of the cloud, saying - This, is, my Son, the Beloved, in whom I delight, - Be hearkening to him.

2 Chronicles 6:1

Then, said Solomon, - Yahweh, said, that he would make his habitation in thick gloom;

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
Then said Yahweh unto Moses: Lo! I, am coming unto thee in the veiling of cloud, in order that the people may hear when I speak with thee, moreover also, that, in thee, they may trust to times age-abiding. Then told Moses the words of the people unto Yahweh.
2 Chronicles 6:1
Then, said Solomon, - Yahweh, said, that he would make his habitation in thick gloom;
Matthew 17:5
While yet he was speaking, lo! a brightly shining cloud, overshadowed them, and lo! a voice, out of the cloud, saying - This, is, my Son, the Beloved, in whom I delight, - Be hearkening to him.

General references

Exodus 24:2
And Moses alone shall draw near unto Yahweh, but, they shall not draw near, and, the people, shall not come up with him.