This is the region the Israelites passed through immediately after the Exodus. It is near the Red Sea.
Numbers 33:7They traveled from before Hahiroth, and crossed through the middle of the sea into the wilderness. They went three days’ journey in the wilderness of Etham, and encamped in Marah.
Exodus 14:2Pharaoh will say of the children of Israel, ‘They are entangled in the land. The wilderness has shut them in.’
Exodus 14:9When Pharaoh came near, the children of Israel) lifted up their eyes, and behold, the Egyptians were marching after them; and they were very afraid. The children of Israel cried out to Yahweh.