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.
Números 21:14
על כן יאמר בספר מלחמת יהוה את והב בסופה ואת הנחלים ארנון:
