Numbers 33:8

Catholic Public Domain Version

And setting out from Pi-hahiroth, they crossed through the middle of the Sea into the wilderness. And having walked for three days through the desert of Etham, they made camp at Marah.

Cross References

Exodus 14:2

"Speak to the sons of Israel. Let them turn back and encamp away from the region of Pihahiroth, which is between Migdol and the sea, opposite Baal-zephon. In its sight you shall place your camp, above the sea.