Sforno on Deuteronomy 34:12/ספורנו על דברים ל״ד:י״ב

1ולכל היד, and when G’d demonstrated His power over immanent parts of the universe such as the Sea of Reeds, when He split it, or the earth when He made it open a crevice to swallow Korach and his cohorts, or when the manna descended from heaven on a regular basis.

2ולכל המורא הגדול, the revelation at Mount Sinai;

3אשר עשה משה לעיני כל בני ישראל, when they were afraid and stood at a distance, whereas Moses approached the mountain which was wrapped in a dark cloud, while it was flaming. During such experiences Moses had acquired the status of a prophet with whom G’d communicates פנים אל פנים At that time G’d also endowed Moses with a kind of awesomeness when He made his forehead emit rays of light.

4לעיני כל ישראל, compare Exodus 34,30 when even Aaron recoiled when he saw Moses.