Numbers 25:7-8

⁷And when Phinehas, the son of Eleazar, the son of Aaron, the priest, had seen this unshamefast doing, he rose from the midst of the multitude; and when he had taken a sword,

⁸he entered after the man of Israel into the whorehouse, and sticked through both together, that is, the man and the woman, in the places of engendering. And the vengeance ceased from the sons of Israel,