And Moses went into the midst of the cloud, and got him up into the mount: and Moses was in the mount forty days and forty nights.
All Commentaries on Exodus 24:18 Go To Exodus 24
Ambrose of Milan
AD 397
If anyone therefore desires to behold this image of God, he must love God so as to be loved by him, no longer as a servant but as a friend who observes his commandments, that he may enter the cloud where God is. On His Brother, Satyrus