Numbers 25:6-8, 14-15

And indeed, one of the children of Israel came and presented to his brethren a Midianite woman in the sight of Moses and in the sight of all the congregation of the children of Israel, who were weeping at the door of the tabernacle of meeting. Now when Phinehas the son of Eleazar, the son of Aaron the priest, saw it, he rose from among the congregation and took a javelin in his hand; and he went after the man of Israel into the tent and thrust both of them through, the man of Israel, and the woman through her body. So the plague was stopped among the children of Israel.

Now the name of the Israelite who was killed, who was killed with the Midianite woman, was Zimri the son of Salu, a leader of a father’s house among the Simeonites. 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.