C. F. Keil and Franz Delitzsch on Exodus 33:6

Exo 33:6

And the people obeyed this commandment, renouncing all that pleased the eye. “The children of Israel spoiled themselves (see at Exo 12:36) of their ornament from Mount Horeb onwards.” Thus they entered formally into a penitential condition. The expression, “from Mount Horeb onwards,” can hardly be paraphrased as it is by Seb. Schmidt, viz., “going from Mount Horeb into the camp,” but in all probability expresses this idea, that from that time forward, i.e., after the occurrence of this event at Horeb, they laid aside the ornaments which they had hitherto worn, and assumed the outward appearance of perpetual penitence.