8 “And He saved them from the hating ones”. Some translators, in order to avoid an expression unusual in Latin, have rendered the word, by a circumlocution, “And He saved them from the hand of those that hated them, and redeemed them from the hand of the enemy.” What price was given in this redemption? Is it a prophecy, since this deed was a figure of Baptism, wherein we are redeemed from the hand of the devil at a great price, which price is the Blood of Christ? Whence this is more consistently figured forth, not by any sea indiscriminately, but by the Red Sea; since blood has a red colour.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)