 According to another opinion, Ezra remained behind so as not to compete, even involuntarily, with Jeshua ben Jozadak for the office of chief priest.Nonetheless, there is a slight controversy within rabbinic sources as to whether or not Ezra had served as Kohen Gadol.Ezra reestablished the text of the Torah, introducing therein the Assyrian or square characters, apparently as a polemical measure against the Samaritans (Talmud Sanhedrin 21b).