2 Kings 3:9

Seven days’ journey - The distance of the route probably followed is not much more than 100 miles. But the difficulties of the way are great; and the army might not be able to move along it at a faster rate than about 15 miles a day.

No water - The kings had probably expected to find sufficient water for both men and baggage animals in the Wady-el-Ahsy, which divides Edom from Moab, and which has a stream that is now regarded as perennial. But it was dried up - quite a possible occurrence with any of the streams of this region.