'Zealous' in the Bible

“Phinehas son of Eleazar, son of Aaron the priest, has turned back My wrath from the Israelites because he was zealous among them with My zeal, so that I did not destroy the Israelites in My zeal.

It will be a covenant of perpetual priesthood for him and his future descendants, because he was zealous for his God and made atonement for the Israelites.”