Exodus 33:21-23

And Jehovah said, Behold, there is a place by me, and thou shalt stand upon the rock: and it shall come to pass, while my glory passeth by, that I will put thee in a cleft of the rock, and will cover thee with my hand until I have passed by: and I will take away my hand, and thou shalt see my back; but my face shall not be seen.