Exodus 33:23

²¹  And the LORD said, Behold, there is a place by me, and thou shalt stand upon a rock:

²²  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 while I pass by:

²³  And I will take away mine hand, and thou shalt see my back parts: but my face shall not be seen.