On the other side of Arnon. — Better, by the side of the Arnon. (Comp. Deuteronomy 2:24; Deuteronomy 2:26.) The Hebrew word which is here used does not determine on which side of the Arnon the encampment was. (Comp. Numbers 22:1, and Note.)
Related Commentaries of Numbers 21:13
Numbers 21:13
13 From thence they removed, and pitched on the other side of Arnon, which is in the wilderness that cometh out of the coasts of the Amorites: for Arnon is the border of Moab, between Moab and the Amorites.