Phinehas

According to the Hebrew Bible, Phinehas or Phineas (/ˈfɪniəs/; Hebrew: פִּינְחָס, Modern Pinəḥas, Tiberian Pinchas) was a priest during the Israelites' Exodus journey, the grandson of Aaron and son of Eleazar, the High Priests (Exodus 6:25). He distinguished himself as a youth at Shittim with his zeal against the Heresy of Peor. He was displeased with the immorality with which the Moabites and Midianites had successfully tempted the Israelites (Numbers 25:1-9) to inter-marry and to worship Baal-peor, so he personally executed an Israelite man and a Midianite woman while they were together in the man's tent, running a javelin or spear through the man and the belly of the woman. His action brought an end to a plague said to have been sent by God to punish the Israelites for sexually intermingling with the Midianites.

...
Wikipedia