When God's glory passed by, what did God say Moses would see?

Answer: God's back

God put Moses in a cleft of the rock and covered him with His hand; Moses would see His back, but not His face.

“and when My glory passes by, I will put you in a cleft of the rock and cover 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.””— Exodus 33:22-23 (BSB)