Deuteronomy 34:12

and in all the strength of the Mighty Hand by which he bare the rod whose weight was forty savin and that divided the sea, and smote the rock; and in all the solemn things which Mosheh did when he received the two tables of sapphire stone, whose weight was forty savin, and carried both of them in his hands in the sight of all Israel.

powerful might the wonders of the Red Sea.

great and awesome acts the revelation at Sinai.

AND IN ALL THE MIGHTY HAND. This alludes to the division of the Red Sea concerning which it is said, And Israel saw the great hand. AND IN ALL THE GREAT TERROR. This is a reference to the Revelation) at Mount Sinai.” See Vol. II, p. 251, Note 17. concerning which it is stated and that His fear may be before you. He mentioned concerning these [two events] that they were done in the sight of all Israel, because he had already referred to all that was done to Pharaoh, and to all his servants, and to all his land. And in the Sifre it is stated:. “And in all the mighty hand — this refers to the smiting of the firstborn, about which it is said, for by a mighty hand shall he send them away. And in all the great terror — this alludes to the division of the Red Sea. Another interpretation: And in all the great terror — this is the Giving of the Torah.”
And by way of the Truth, [the mystic teachings of the Cabala], the mighty hand is the attribute of justice, similar to the expressions: the hand of the Eternal was upon me; for the hand of the Eternal hath wrought this. Therefore it is said with reference to [His] judgment, for the hand of the Eternal is gone forth against me. And the great terror is the attribute of mercy, similar to what is written, Him shall ye sanctify, and let Him be your fear. The Rabbis in the Sifre. meant this when referring to the smiting of the firstborn [which was done by the mighty hand, alluding to the attribute of justice] and the division of the Red Sea [which is alluded to in the phrase and in all the great terror referring to the attribute of mercy], for concerning them it is written, to make Thyself a Glorious Name., 63:14. The rescue of Israel at the Red Sea displayed G-d’s mercy to His people just as the retributive punishment upon the Egyptian firstborn manifested His justice. Both were to make Him a glorious Name.

ולכל 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.

ולכל המורא הגדול, the revelation at Mount Sinai;

אשר 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.

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