Rashi on Exodus 33:18/רש"י על שמות ל״ג:י״ח

1ויאמר הראני נא את כבדך AND HE SAID I BESEECH THEE, SHOW ME THY GLORY — Moses saw that the hour was propitious and that his petitions were being favourably received, he therefore made a further request — that God should let him behold a reflection of His Glory.