Numbers 25:3-8

³And Israel consecrated themselves to Baal-peor; and the Lord was very angry with Israel.

⁴And the Lord said to Moses, Take all the princes of the people, and make them examples of judgment for the Lord in the face of the sun, and the anger of the Lord shall be turned away from Israel.

⁵And Moses said to the tribes of Israel, Slay ye every one his friend that is consecrated to Baal-peor.

⁶And, behold, a man of the children of Israel came and brought his brother to a Midianitish woman before Moses, and before all the congregation of the children of Israel; and they were weeping at the door of the tabernacle of witness.

⁷And Phinehas the son of Eleazar, the son of Aaron the priest, saw it, and rose out of the midst of the congregation, and took a javelin in his hand,

⁸and went in after the Israelitish man into the chamber, and pierced them both through, both the Israelitish man, and the woman through her womb; and the plague was stayed from the children of Israel.