Numbers 25:6-8

6Then one of the Israelites came and presented to his relatives a Midianite woman, in the sight of Moses and the whole congregation of the Israelites, while they were weeping [over God’s judgment] at the doorway of the Tent of Meeting (tabernacle).

7When Phinehas the son of Eleazar, the son of Aaron the priest, saw this, he left the congregation and took a spear in his hand,

8and he went after the man of Israel into the tent, and pierced both of them through the body, the man of Israel and the woman. Then the plague on the Israelites stopped.