Exodus 24:12-18

And Jehovah said unto Moses, Come up to me into the mount, and be there: and I will give thee the tables of stone, and the law and the commandment, which I have written, that thou mayest teach them. And Moses rose up, and Joshua his minister: and Moses went up into the mount of God. And he said unto the elders, Tarry ye here for us, until we come again unto you: and, behold, Aaron and Hur are with you: whosoever hath a cause, let him come near unto them. And Moses went up into the mount, and the cloud covered the mount. And the glory of Jehovah abode upon mount Sinai, and the cloud covered it six days: and the seventh day he called unto Moses out of the midst of the cloud. And the appearance of the glory of Jehovah was like devouring fire on the top of the mount in the eyes of the children of Israel. And Moses entered into the midst of the cloud, and went up into the mount: and Moses was in the mount forty days and forty nights.