15 When Moses ascended to the mountain, the cloud covered the mountain,
Exodus 24:15 Cross References - CLV
Exodus 19:9
9 then Yahweh said to Moses: Behold, I am coming to you in a thick cloud in order that the people shall hear when I speak with you, and moreover, in you shall they believe for the eon. So Moses told the words of the people to Yahweh.
Exodus 19:16
16 It came to be on the third day, at the coming of the morning, that there came to be sounds and flashes and a heavy cloud on the mount, and the sound of a trumpet, exceedingly steadfast. Hence all the people who were in the camp trembled.
2 Chronicles 6:1
1 Then said Solomon, `Yahweh said--to dwell in thick darkness,
Matthew 17:5
5 While he is still speaking, lo! a luminous cloud overshadows them, and lo! a voice out of the cloud, saying, "This is My Son, the Beloved, in Whom I delight. Hear Him!"