Phinehas, the son of Eleazar, the son of Aaron the priest... — The description of Phinehas, as in Numbers 25:7, is repeated in full, as if to denote that he was not a private individual, but one invested with public authority.
While he was zealous for my sake among them. — Better, in that he was jealous with my jealousy (or, in that he displayed my jealousy).