Exodus 33:18 (KJV)

Now therefore, I pray thee, if I have found grace in thy sight, shew me now thy way, that I may know thee, that I may find grace in thy sight: and consider that this nation is thy people.

And he said, My presence shall go with thee, and I will give thee rest.

And he said unto him, If thy presence go not with me, carry us not up hence.

For wherein shall it be known here that I and thy people have found grace in thy sight? is it not in that thou goest with us? so shall we be separated, I and thy people, from all the people that are upon the face of the earth.

And the LORD said unto Moses, I will do this thing also that thou hast spoken: for thou hast found grace in my sight, and I know thee by name.

And he said, I will make all my goodness pass before thee, and I will proclaim the name of the LORD before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy.

And he said, Thou canst not see my face: for there shall no man see me, and live.

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

And it shall come to pass, while my glory passeth by, that I will put thee in a clift of the rock, and will cover thee with my hand while I pass by:

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