Numbers 25:5, 7-12

So Moses said to Israel’s judges, “Each of you must put to death those of your people who have yoked themselves to the Baal of Peor.”

When Phinehas son of Eleazar, the son of Aaron, the priest, saw this, he left the assembly, took a spear in his hand and followed the Israelite into the tent. He drove the spear into both of them, right through the Israelite man and into the woman’s stomach. Then the plague against the Israelites was stopped; but those who died in the plague numbered 24,000. The LORD said to Moses, “Phinehas son of Eleazar, the son of Aaron, the priest, has turned my anger away from the Israelites. Since he was as zealous for my honor among them as I am, I did not put an end to them in my zeal. Therefore tell him I am making my covenant of peace with him.