Numbers 25:6-9

6Just then one of the Israelites came and brought to his brothers a Midianite woman in the plain view of Moses and of the whole community of the Israelites, while they were weeping at the entrance of the tent of meeting.

7When Phinehas son of Eleazar, the son of Aaron the priest, saw it, he got up from among the assembly, took a javelin in his hand,

8and went after the Israelite man into the tent and thrust through the Israelite man and into the woman’s abdomen. So the plague was stopped from the Israelites.

9Those that died in the plague were 24,000.