And they took their journey out of the wilderness of Sin, and encamped in Dophkah.
Dophkah ... Alush ... Rephidim. These three stations, in the great valleys of Wady Mukatteb, El Sheikh, and Feiran, would be equivalent to four days' journey for such a host. Rephidim (Exodus 16:6) was in Horeb, the burnt region-a generic name for a hot mountainous country.