Numbers 25:3-7

³Israel joined himself to Baal Peor, and Yahweh’s anger burned against Israel.

⁴Yahweh said to Moses, “Take all the chiefs of the people, and hang them up to Yahweh before the sun, that the fierce anger of Yahweh may turn away from Israel.”

⁵Moses said to the judges of Israel, “Everyone kill his men who have joined themselves to Baal Peor.”

⁶Behold, one of the children of Israel came and brought to his brothers a Midianite woman in the sight of Moses, and in the sight of all the congregation of the children of Israel, while they were weeping at the door of the Tent of Meeting.

⁷When Phinehas, the son of Eleazar, the son of Aaron the priest, saw it, he rose up from the middle of the congregation, and took a spear in his hand.