Then sang Moses and the children of Israel this song unto the LORD, and spoke, saying, I will sing unto the LORD, for he has triumphed gloriously: the horse and his rider has he thrown into the sea.
All Commentaries on Exodus 15:1 Go To Exodus 15
Augustine of Hippo
“For he has been gloriously extolled” who has already granted us in the bath of regeneration what we have been singing about: “horse and rider he has cast into the sea.” All our past sins, you see, which have been pressing on us, as it were, from behind, he has drowned and obliterated in baptism. These dark things of ours were being ridden by unclean spirits as their mounts, and like horsemen they were riding them wherever they liked. That’s why the apostle calls them “rulers of this darkness.” We have been rid of all this through baptism, as through the Red Sea, so called because sanctified by the blood of the crucified Lord. Let us not turn back to Egypt in our hearts, but with him as our protector and guide let us wend our way through the other trials and temptations of the desert toward the kingdom. ..