But God led the people about, through the way of the wilderness of the Red sea: and the children of Israel went up equipped for battle out of the land of Egypt.
Read Chapter 13
Just as the Jews were saved and extricated through the waters of the Red Sea, so we are delivered from the land of Egypt, that is, from the sins of the flesh, and reborn through regeneration by the sacred water. The very name of the Red Sea is not superfluous. Just as it is known as Red, so the baptismal water can be labeled red, for it came forth mixed with blood from the Lord Savior’s side.
Armed, in order of battle. Hebrew chamushim, "by fives "or in five battalions. (Josue i. 14; Judges viii. 11.) (Calmet)
Calvin asks where the Hebrews could procure arms, as if to cavil with this translation. But surely they might get them in the same manner as the vessels of gold; and they undoubtedly were not destitute of arms when they encountered the Amalecites, ver. 17. (Haydock)