exodus 14:2 Speak unto the children of Israel, that they turn and encamp before Pihahiroth, between Migdol and the sea, over against Baalzephon: before it shall ye encamp by the sea. - Free Bible Online

      2. Speak unto the children of Israel, that they turn and encamp--The Israelites had now completed their three days' journey, and at Etham the decisive step would have to be taken whether they would celebrate their intended feast and return, or march onwards by the head of the Red Sea into the desert, with a view to a final departure. They were already on the borders of the desert, and a short march would have placed them beyond the reach of pursuit, as the chariots of Egypt could have made little progress over dry and yielding sand. But at Etham, instead of pursuing their journey eastward with the sea on their right, they were suddenly commanded to diverge to the south, keeping the gulf on their left; a route which not only detained them lingering on the confines of Egypt, but, in adopting it, they actually turned their backs on the land of which they had set out to obtain the possession. A movement so unexpected, and of which the ultimate design was carefully concealed, could not but excite the astonishment of all, even of Moses himself, although, from his implicit faith in the wisdom and power of his heavenly Guide, he obeyed. The object was to entice Pharaoh to pursue, in order that the moral effect, which the judgments on Egypt had produced in releasing God's people from bondage, might be still further extended over the nations by the awful events transacted at the Red Sea.
      Pi-hahiroth--the mouth of the defile, or pass--a description well suited to that of Bedea, which extended from the Nile and opens on the shore of the Red Sea.
      Migdol--a fortress or citadel.
      Baal-zephon--some marked site on the opposite or eastern coast.

JFB.