Rashi on Deuteronomy 34:12/רש"י על דברים ל״ד:י״ב

1ולכל היד החזקה AND IN ALL THAT STRONG HAND — this refers to the fact that he received the Torah that was on the Tablets, in his hands.

2ולכל המורא הגדול AND IN ALL THAT GREAT TERRIBLENESS — the miracles and mighty deeds that were wrought in the great and terrible wilderness (cf. (Sifrei Devarim 357:45).

3לעיני כל ישראל [WHICH MOSES SHOWED] BEFORE THE EYES OF ALL ISRAEL — This refers to the fact that his heart inspired him to shatter the Tablets before their eyes, as it is said, (Deuteronomy 9:17) “And I broke them before your eyes” (Sifrei Devarim 357:45), and the opinion of the Holy One, blessed be He, regarding this action agreed with his opinion, as it is stated that God said of the Tablets, (Exodus 34:1) אשר שברת "Which you have broken", [which implies] "May your strength be fitting (יישר; an expression of thanks and congratulation) because you have broken them" (Yevamot 62a; Shabbat 87a).