Exodus 24:12-18

12And Yhwh said unto Moses, Come up to me into the mount, and be there: and I will give thee tables of stone, and a law, and commandments which I have written; that thou mayest teach them. 13And Moses rose up, and his minister Joshua: and Moses went up into the mount of God. 14And he said unto the elders, Tarry ye here for us, until we come again unto you: and, behold, Aaron and Hur are with you: if any man have any matters to do, let him come unto them. 15And Moses went up into the mount, and a cloud covered the mount. 16And the glory of Yhwh 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. 17And the sight of the glory of Yhwh was like devouring fire on the top of the mount in the eyes of the children of Israel. 18And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.