15 And Moses went up onto the mountain and the cloud covered the mountain.
Exodus 24:15 Cross References - MLV
Exodus 19:9
9 And Jehovah said to Moses, Behold, I come to you in a thick cloud, that the people may hear when I speak with you and may also believe you everlasting. And Moses told the words of the people to Jehovah.
Exodus 19:16
16 And it happened on the third day, when it was morning, that there were thunders and lightnings and a thick cloud upon the mountain and the voice of an exceedingly loud trumpet. And all the people who were in the camp trembled.
2 Chronicles 6:1
1 Then Solomon spoke, Jehovah has said that he would dwell in the thick darkness.
Matthew 17:5
5 While he is still speaking, behold, a radiant cloud overshadowed them, and behold, a voice out of the cloud, saying, This is my beloved Son, in whom I am delighted; hear him!