Numbers 33:8

Amplified Bible

They moved out from before Pi-hahiroth and passed through the midst of the [Red] Sea into the wilderness; and they went a three days’ journey in the Wilderness of Etham and camped at Marah.

Cross References

Exodus 14:2

“Tell the sons of Israel to turn back and camp in front of Pi-hahiroth, between Migdol and the sea. You shall camp in front of Baal-zephon, opposite it, by the sea.