Matthew Henry on Exodus 33:1-6

Those whom God pardons, must be made to know what their sin deserved. “Let them go forward as they are;” this was very expressive of God's displeasure. Though he promises to make good his covenant with Abraham, in giving them Canaan, yet he denies them the tokens of his presence they had been blessed with. The people mourned for their sin. Of all the bitter fruits and consequences of sin, true penitents most lament, and dread most, God's departure from them. Canaan itself would be no pleasant land without the Lord's presence. Those who parted with ornaments to maintain sin, could do no less than lay aside ornaments, in token of sorrow and shame for it.