Numbers 33:8

New Century Version

They left Pi Hahiroth and walked through the sea into the desert. After going three days through the Desert of Etham, they camped at Marah.

Cross References

Exodus 14:2

“Tell the Israelites to turn back to Pi Hahiroth and to camp between Migdol and the Red Sea. Camp across from Baal Zephon, on the shore of the sea.