Numbers 25:15, 18

And the name of the Midianite woman who was killed was Cozbi the daughter of Zur; he was head of the people of a father’s house in Midian.

for they harassed you with their schemes by which they seduced you in the matter of Peor and in the matter of Cozbi, the daughter of a leader of Midian, their sister, who was killed in the day of the plague because of Peor.”