Verses with the word peor in the Old Testament (4 verses):

Numbers 23:28
And Balak brought Balaam unto the top of Peor, that looketh toward Jeshimon.

Numbers 25:18
For they vex you with their wiles, wherewith they have beguiled you in the matter of Peor, and in the matter of Cozbi, the daughter of a prince of Midian, their sister, which was slain in the day of the plague for Peor's sake.

Numbers 31:16
Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the LORD in the matter of Peor, and there was a plague among the congregation of the LORD.

Joshua 22:17
Is the iniquity of Peor too little for us, from which we are not cleansed until this day, although there was a plague in the congregation of the LORD,