Numbers 25:6-8, 14-15

Moses and the Israelites were gathered at the entrance to the Meeting Tent, crying there. Then an Israelite man brought a Midianite woman to his brothers in plain sight of Moses and all the people. Phinehas son of Eleazar, the son of Aaron, the priest, saw this, so he left the meeting and got his spear. He followed the Israelite into his tent and drove his spear through both the Israelite man and the Midianite woman. Then the terrible sickness among the Israelites stopped.

The Israelite man who was killed with the Midianite woman was named Zimri son of Salu. He was the leader of a family in the tribe of Simeon. And the name of the Midianite woman who was put to death was Cozbi daughter of Zur, who was the chief of a Midianite family.