Rashi on Exodus 33:3/רש"י על שמות ל״ג:ג׳

1ארץ זבת חלב ודבש UNTO A LAND FLOWING WITH MILK AND HONEY do I bid you to bring them up.

2כי לא אעלה בקרבך BECAUSE I WILL NOT GO UP AMONG THEE, therefore I say to thee, I will send an angel before thee.

3כי עם קשה ערף אתה FOR THOU ART A STIFF-NECKED PEOPLE, and if My Shechina were in thy midst and thou rebelledst against Me, I might become exceedingly angry with thee and destroy thee on the way.

4אכלך is an expression for ‘‘destroying”.