16. from Gilead--that is, not the mountainous region, but the town
Ramoth-gilead,
even unto the riverArnon half the valley--The word "valley" signifies
a wady, either filled with water or dry, as the Arnon is in summer, and
thus the proper rendering of the passage will be--"even to the half
or middle of the river Arnon" (compare
Jos 12:2).
This prudent arrangement of the boundaries was evidently made to
prevent all disputes between the adjacent tribes about the exclusive
right to the water.
JFB.
Picture Study Bible