Numbers 25:18

25:18 because they bring trouble to you by their treachery with which they have deceived you in the matter of Peor, and in the matter of Cozbi, the daughter of a prince of Midian, their sister, who was killed on the day of the plague that happened as a result of Peor.”

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.

Joshua 22:17

22:17 The sin we committed at Peor was bad enough. To this very day we have not purified ourselves; it even brought a plague on the community of the Lord.