LXX Deut 4:46

ἐν τῷ πέραν τοῦ Ἰορδάνου, ἐν φάραγγι ἐγγὺς οἴκου Φογώρ, ἐν γῇ Σηὼν βασιλέως τῶν Ἀμορραίων, ὃς κατῴκει ἐν Ἑσεβών, οὓς ἐπάταξεν Μωσῆς καίοι υἱοὶ Ἰσραήλ, ἐξελθόντων αὐτῶν ἐκ γῆς Αἰγύπτου.

while they were in the valley across the Jordan facing Beth-peor in the land of Sihon king of the Amorites, who lived in Heshbon and was defeated by Moses and the Israelites after they had come out of Egypt.