Exodus 14:2-4
2 “Tell the Israelites to turn back and encamp near Pi Hahiroth, between Migdol and the sea. They are to encamp by the sea, directly opposite Baal Zephon.
3 Pharaoh will think, ‘The Israelites are wandering around the land in confusion, hemmed in by the desert.’
4 And I will harden Pharaoh’s heart, and he will pursue them. But I will gain glory for myself through Pharaoh and all his army, and the Egyptians will know that I am the Lord.” So the Israelites did this.