With regards to the question of the text of the Qur'an, it has already been noted that the early Shi'is believed that the Qur'an has been altered and parts of it has been suppressed. The Nawbakhtis are said to have adhered to this view although it went against their usual position of agreeing with Mu'tazili thought. The compiler of the earliest, authoritative collection of Twelver Traditions, al-Kulyani, seems to have given some substance to this view in several of the Traditions that he relates.