What does Exodus 13:17 mean?
The night before Israel's release from slavery (Exodus 12:40–41), God commanded them to prepare unleavened bread (Exodus 12:8). When they were suddenly ordered to leave (Exodus 12:31–33), this gave them provisions to take on their journey (Exodus 12:34, 39). It also meant that Israel could travel quickly (Exodus 13:21). This will be important soon: the Egyptian king is about to change his mind once again by sending his military to pursue Israel (Exodus 14:5–9).God is directly guiding the Israelite march out of Egypt (Exodus 13:21–22). Their path is not direct. The major northern roads ran near the Mediterranean. To follow this very direct path to the Promised Land (Genesis 12:6–7; 15:13–21) would take the newly freed nation directly through Philistine territory (Exodus 23:31). Along the way, they would encounter Egyptian military posts. Worse, the Egyptians will catch up to them easily. So, the Lord will take them south, instead.
Some translations indicate that Israel was combat ready (Exodus 13:18), but this is probably a mistranslation of an obscure Hebrew word. The people may have been ready to fight, mentally, but it would take God's supernatural intervention to save them from disaster (Exodus 14:27–29). So, the Lord leads them to the seashore (Exodus 14:1–4).