Peor

Balak took Balaam to the top of Peor, that looks down on the desert.

for they harassed you with their wiles, with which they have deceived you in the matter of Peor, and in the matter of Cozbi, the daughter of the prince of Midian, their sister, who was slain on the day of the plague in the matter of Peor.”

Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the LORD in the matter of Peor, and so the plague was among the congregation of the LORD.

Is the iniquity of Peor too little for us, from which we have not cleansed ourselves to this day, although there came a plague on the congregation of the LORD,