Exodus 24:15

12 And Jehovah saith unto Moses, `Come up unto Me to the mount, and be there, and I give to thee the tables of stone, and the law, and the command, which I have written to direct them.`

13 And Moses riseth -- Joshua his minister also -- and Moses goeth up unto the mount of God;

14 and unto the elders he hath said, `Abide ye for us in this [place], until that we turn back unto you, and lo, Aaron and Hur [are] with you -- he who hath matters doth come nigh unto them.`

15 And Moses goeth up unto the mount, and the cloud covereth the mount;

16 and the honour of Jehovah doth tabernacle on mount Sinai, and the cloud covereth it six days, and He calleth unto Moses on the seventh day from the midst of the cloud.

17 And the appearance of the honour of Jehovah [is] as a consuming fire on the top of the mount, before the eyes of the sons of Israel;

18 and Moses goeth into the midst of the cloud, and goeth up unto the mount, and Moses is on the mount forty days and forty nights.