Exodus 13:17-18

And it came to pass, when Pharaoh had let the people go, that God led them not by the way of the land of the Philistines, although that was near; for God said, Lest peradventure the people repent when they see war, and they return to Egypt: but God led the people about, by the way of the wilderness by the Red Sea: and the children of Israel went up armed out of the land of Egypt.