Parallel
Numbers 21:13
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ἐκεῖθεν ἀπάραντες παρενέβαλον εἰς τὸ πέραν Αρνων ἐν τῇ ἐρήμῳ τὸ ἐξέχον ἀπὸ τῶν ὁρίων τῶν Αμορραίων ἔστιν γὰρ Αρνων ὅρια Μωαβ ἀνὰ μέσον Μωαβ καὶ ἀνὰ μέσον τοῦ Αμορραίου
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.