Numbers 25:5-7

Young's Literal Translation

⁵ And Moses saith unto the judges of Israel, `Slay ye each his men who are joined to Baal-Peor.'

⁶ And lo, a man of the sons of Israel hath come, and bringeth in unto his brethren the Midianitess, before the eyes of Moses, and before the eyes of all the company of the sons of Israel, who are weeping at the opening of the tent of meeting;

⁷ and Phinehas, son of Eleazar, son of Aaron, the priest, seeth, and riseth from the midst of the company, and taketh a javelin in his hand,