 According to the Bible, Ezra and Nehemiah arrived in Jerusalem in the middle of the 5th century BCE, the first empowered by the Persian king to enforce the Torah, the second with the status of governor and a royal mission to restore the walls of the city.The Bible mentions tension between the returnees and those who had remained in Judah, the former rebuffing the attempt of the "peoples of the land" to participate in the rebuilding of the Temple; this attitude was based partly on the exclusivism which the exiles had developed while in Babylon and, probably, partly on disputes over property.The careers of Ezra and Nehemiah in the 5th century BCE were thus a kind of religious colonisation in reverse, an attempt by one of the many Jewish factions in Babylon to create a self-segregated, ritually pure society inspired by the prophesies of Ezekiel and his followers.