Numbers 25:3

3So Israel yoked himself to Baal of Peor. And the anger of the Lord was kindled against Israel.

Deuteronomy 4:46

46beyond the Jordan ain the valley opposite Beth-peor, in the land of Sihon the king of the Amorites, who lived at Heshbon, bwhom Moses and the people of Israel defeated when they came out of Egypt.
Copyright information for ESV