From the early Church Fathers to now.
“And the waters returned, and covered the chariots and the horsemen of all the army of Pharao, who had come into the sea after them, neither did there so much as one of them remain.”
“Pharaoh and his army and all the leaders of Egypt, "the chariots and their riders," were drowned in the Red Sea and perished for no other reason than that their foolish hearts were hardened, after the working of signs and wonders in the land of Egypt by God's servant Moses.”
“The waters of the sea were held back yet at the same time surrounding the Hebrews. They then poured back and brought death upon the Egyptians, so that they destroyed one people and saved the other. What too do we find in the Gospel itself? Did not our Lord show there that the sea grew calm at his word, that the storm clouds of heaven were scattered, that the blasts of the winds subsided and that the dumb elements obeyed him and the shores were quieted?”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.