Numbers 21:13

13 From thence they removed and pitched on the other side of Arnon, which is in the wilderness that comes out of the borders of the Amorite; for Arnon is the border of Moab between Moab and the Amorite.

Numbers 21:13 Meaning and Commentary

Numbers 21:13

From thence they removed, and pitched on the other side of
Arnon
A river on the borders of Moab:

which is in the wilderness that cometh out of the coasts of the
Amorites;
according to Jarchi, they went round the land of Moab, all to the south and east, and came not into the border of Moab, as Jephthah said, ( Judges 11:18 ) but before they came hither they had a station at Almondiblathaim, ( Numbers 33:46 Numbers 33:47 )

for Arnon is the border of Moab, between Moab and the Amorites;
a river which divided these two countries, and bounded them; and Moses is the more particular in this account, to show that the Israelites took nothing from the Moabites, but what the Amorites had taken from them, they being charged not to distress the Moabites and Ammonites, ( Deuteronomy 2:9 Deuteronomy 2:19 ) , see Jephthah's defence, ( Judges 11:15-27 ) .

Numbers 21:13 In-Context

11 And they journeyed from Oboth and pitched at Ijeabarim, in the wilderness which is before Moab, toward the rising of the sun.

12 From there they removed and pitched in the valley of Zared.

13 From thence they removed and pitched on the other side of Arnon, which is in the wilderness that comes out of the borders of the Amorite; for Arnon is the border of Moab between Moab and the Amorite.

14 Therefore it is said in the book of the battles of the LORD, What he did in the Red sea, and in the brooks of Arnon

15 and at the stream of the brooks that goes down to the dwelling of Ar, and lies upon the border of Moab.