Deuteronomy 4:3

4:3 You have witnessed what the Lord did at Baal Peor, how he eradicated from your midst everyone who followed Baal Peor.

Deuteronomy 4:46

4:46 in the Transjordan, in the valley opposite Beth Peor, in the land of King Sihon of the Amorites, who lived in Heshbon. (It is he whom Moses and the Israelites attacked after they came out of Egypt.