Exodus 24
16 Ref And the glory of the Lord was resting on Mount Sinai, and the cloud was over it for six days; and on the seventh day he said Moses' name out of the cloud.
17 Ref And the glory of the Lord was like a flame on the top of the mountain before the eyes of the children of Israel.
18 Ref And Moses went up the mountain, into the cloud, and was there for forty days and forty nights.