Numbers 25:16-18 - Vengeance Against The Midianites
16 And the LORD spake unto Moses, saying, 17 Vex the Midianites, and smite them: 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.