This reading is from the special Torah portion read on the intermediate Shabbat of Passover, April 26, 2008. The complete reading is Exodus 33:12 - 34:26 and Numbers 28:16-25.
Moses said to the Lord, "See, You say to me, 'Lead this people forward,' but You have not made known to me whom You will send with me. Further, You have said, 'I have singled you out by name, and you have, indeed, gained My favor.' Now, if I have truly gained Your favor, pray let me know Your ways, that I may know You and continue in Your favor. Consider, too, that this nation is Your people." And He said, "I will go in the lead and will lighten your burden." And he said to Him, "Unless You go in the lead, do not make us leave this place. For how shall it be known that Your people have gained Your favor unless You go with us, so that we may be distinguished, Your people and I, from every people on the face of the earth?"
And the Lord said to Moses, "I will also do this thing that you have asked; for you have truly gained My favor and I have singled you out by name." He said, "Oh, let me behold Your Presence!" And He answered, "I will make all My goodness pass before you, and I will proclaim before you the name Lord, and the grace that I grant and the compassion that I show. But," He said, "you cannot see My face, for man may not see Me and live."
And the Lord said, "See, there is a place near Me. Station yourself on the rock and, as My Presence passes by, I will put you in a cleft of the rock and shield you with My hand until I have passed by. Then I will take My hand away and you will see My back; but My face must not be seen."
The Lord said to Moses: "Carve two tablets of stone like the first, and I will inscribe upon the tablets the words that were on the first tablets, which you shattered. Be ready by morning, and in the morning come up to Mount Sinai and present yourself there to Me, on the top of the mountain. No one else shall come up with you, and no one else shall be seen anywhere on the mountain; neither shall the flocks and the herds graze at the foot of this mountain."