Numbers 25:14-18

14The name of the Israelite who was slain with the Midianite woman was Zimri son of Salu, the leader of a Simeonite family. 15And the name of the slain Midianite woman was Cozbi, the daughter of Zur, a tribal chief of a Midianite family.

16And the LORD said to Moses, 17“Attack the Midianites and strike them dead. 18For they assailed you deceitfully when they seduced you in the matter of Peor and their sister Cozbi, the daughter of the Midianite leader, the woman who was killed on the day the plague came because of Peor.”