Exodus 24:15

13Moses rose up with Joshua, his servant, and Moses went up onto God’s Mountain.

14He said to the elders, “Wait here for us, until we come again to you. Behold, Aaron and Hur are with you. Whoever is involved in a dispute can go to them.”

15Moses went up on the mountain, and the cloud covered the mountain.

16The LORD’s glory settled on Mount Sinai, and the cloud covered it six days. The seventh day he called to Moses out of the middle of the cloud.

17The appearance of the LORD’s glory was like devouring fire on the top of the mountain in the eyes of the children of Israel.