Numbers 25:15

25:15 The name of the Midianite woman who was killed was Cozbi daughter of Zur. He was a leader over the people of a clan of Midian.

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.”