GOD'S WORD® Translation
They moved from there and set up camp on the other side of the Arnon Valley in the desert that extends into Amorite territory. (The Arnon Valley is the border between Moab and the Amorites.)

American Standard Version
From thence they journeyed, and encamped on the other side of the Arnon, which is in the wilderness, that cometh out of the border of the Amorites: for the Arnon is the border of Moab, between Moab and the Amorites.

Berean Study Bible
From there they moved on and camped on the other side of the Arnon, in the wilderness that extends into the Amorite territory. Now the Arnon is the border between the Moabites and the Amorites.

Douay-Rheims Bible
Which they left and encamped over against Arnon, which is in the desert and standeth out on the borders of the Amorrhite. For Arnon is the border of Moab, dividing the Moabites and the Amorrhites.

English Revised Version
From thence they journeyed, and pitched on the other side of Arnon, which is in the wilderness, that cometh out of the border of the Amorites: for Arnon is the border of Moab, between Moab and the Amorites.

King James Bible
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.

World English Bible
From there they traveled, and encamped on the other side of the Arnon, which is in the wilderness, that comes out of the border of the Amorites: for the Arnon is the border of Moab, between Moab and the Amorites.

Young's Literal Translation
From thence they have journeyed, and encamp beyond Arnon, which is in the wilderness which is coming out of the border of the Amorite, for Arnon is the border of Moab, between Moab and the Amorite;

Numbers 21:13 Additional Translations ...