Exodus 24:15-16

"And Moses went up into the mount, and the cloud covered the mount. And the glory of Jehovah shone upon mount Sinai, and the cloud covered it six days: and the seventh day he called unto Moses out of the cloud."

"The cloud ..." The significance of that cloud is that, "It represents God's presence. Nevertheless, it is not to be wholly identified with him. It is intended to affirm that his presence was with Israel, without lessening the idea of his divine majesty and heavenly sovereignty.[19]

The period of six days waiting must have been a trial for Moses. Men have a great deal of trouble with their impatience. Men are always in a hurry, but God is never in a hurry. Moses may have felt that he needed to be with Israel; and, as events developed, it is certain that such a need was there. But the duty of Moses was to wait, as patiently as possible, until God revealed for him his next duty.