The Dukayniyya Shia (named for one of its leaders, Abu Nu'aym al-Fadl ibn al-Dukayn)Mediaeval Isma'ili History and Thought, By Farhad Daftary, pg.315 were a sect of the Zaidi branch of Shia Islam. The Dukayniyya Shia were led by Abu Nu'aym al-Fadl ibn al-Dukayn and Ibrahim ibn al-Hakam.
Beliefs The Dukayniyya Shia had the following beliefs: They believed that the Imams after Muhammad were (in chronological order): Ali, then Hasan ibn Ali, then Husayn ibn Ali, then Ali ibn Husayn ibn Ali, then Zayd ibn Ali ibn Husayn ibn Ali, then Yahya ibn Zayd ibn Ali, then The Imam is any male from the descendants of either Hassan or Husayn who arises and openly seeks the Imamate and is knowledgeable and just. They believed in aiding and revolting along with anyone who was opposing evil and upholding goodness. They believed that the world will always have an Imam and never be without one. They believed Muhammad’s followers fell into unbelief after his death because they did not uphold the Imamate of Ali, but instead accepted Abu Bakr as the first leader of the Muslim community after Muhammad. They had similar beliefs to the Jarudiyya Zaydis and the Mu'tazilites with regard to the transcendent unity of God, the "promise and threat", justice, and other doctrines.
See also Islamic schools and branches List of extinct Shia sects
References An Ismaili heresiography: the "Bāb al-shayṭān" from Abū Tammām's Kitāb al ..., By Wilferd Madelung, Paul Ernest Walker, pg.90-91
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