And Moses stretched forth his hand over the sea, and the sea returned to its place when the morning appeared; and the Egyptians fled against it; and the LORD overthrew the Egyptians in the midst of the sea.
All Commentaries on Exodus 14:27 Go To Exodus 14
Gregory of Nyssa
AD 394
But after that the surface of the sea became one again, and the temporary gap was flooded over. So this remains a unique event which occurred in such a way that the marvel did not lose credibility because of the passage of time, since it continues to be testified to by visible traces. That is the way the affair of the marshy lake is both described and shown.