Sforno on Exodus 15:8/ספורנו על שמות ט״ו:ח׳

1וברוח אפיך נערמו מים, now Moses speaks of the third war G’d conducted against the multitudes of Egypt; (not the elite) Moses recapitulates the phenomena faced by the Egyptian hordes when the waters which had previously been normal became like towers of frozen water in the midst of the sea.