Rashi on Exodus 33:5/רש"י על שמות ל״ג:ה׳

1רגע אחד אעלה בקרבך וכליתיך WERE I TO GO UP AMONG THEE ONE MOMENT, I SHOULD CONSUME THEE — If I were to go up amongst you and you rebelled against Me in your stiff-neckedness I would be angry with you but one moment — for this is the duration of His wrath (Berakhot 7a), as it is said, (Isaiah 26:20) “Hide thyself for a short moment, until the indignation be passed” — and I would consume you; therefore it is better for you that I should send an angel.

2ועתה AND NOW — This punishment shall be inflicted upon you now, at once, viz., that you should put off your ornaments from you.

3ואדעה מה אעשה לך AND I KNOW WHAT I SHALL DO UNTO THEE — In respect to the visitation for the remainder of the sin which still remains unpunished (cf. Rashi on Exodus 32:34) I know what is in My mind to do unto you.