46 and were in the valley near Beth Peor east of the Jordan, in the land of Sihon king of the Amorites, who reigned in Heshbon and was defeated by Moses and the Israelites as they came out of Egypt.

Read Deuteronomy 4:46 Using Other Translations

On this side Jordan, in the valley over against Bethpeor, in the land of Sihon king of the Amorites, who dwelt at Heshbon, whom Moses and the children of Israel smote, after they were come forth out of Egypt:
beyond the Jordan in the valley opposite Beth-peor, in the land of Sihon the king of the Amorites, who lived at Heshbon, whom Moses and the people of Israel defeated when they came out of Egypt.
and as they camped in the valley near Beth-peor east of the Jordan River. (This land was formerly occupied by the Amorites under King Sihon, who ruled from Heshbon. But Moses and the Israelites destroyed him and his people when they came up from Egypt.