Numbers 33:8

New International Version

They left Pi Hahiroth and passed through the sea into the desert, and when they had traveled for three days in the Desert of Etham, they camped at Marah.

Cross References

Exodus 14:2

“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.