And they departed from before Pihahiroth,.... Being forced by Pharaoh's army pressing upon them:

and passed through the midst of the sea; from shore to shore, as on dry laud:

into the wilderness: that part of it which lay on the other side, for still it was the wilderness of Etham they went into, as follows:

and went three days' journey in the wilderness of Etham, and pitched in Marah; so called from the bitterness of the waters there, and which is computed to be forty miles from Pihahiroth.

Marah--thought to be Ain Howarah, both from its position and the time (three days) it would take them with their children and flocks to march from the water of Ayun Musa to that spot.