Exodus 14:1,2

The Lord spake Or rather had spoken, before they came to Succoth, Exodus 12:37. For what was there briefly and generally expressed, is here more largely and particularly declared, together with the occasion of it, which was God's command. Speak unto the children of Israel They were got to the edge of the wilderness, Exodus 13:20, and one stage or two would have brought them to Horeb, the place appointed for their serving God; but, instead of going forward, they are ordered to turn short off on the right hand from Canaan, and to march toward the Red sea. When they were at Etham, there was no sea in their way to obstruct their passage; but God himself orders them into straits, which might give them an assurance, that when his purposes were served, he would bring them out of those straits. Before Pi-hahiroth Or, the straits of Hiroth, two great mountains, between which they marched. Migdol and Baal-zephon were cities of Egypt, and probably garrisoned.