Abū al-Sibṭayn (Arabic: أبوالسبطین) is one of the teknonyms of Imam Ali (a).
Since the word "sibt" (Arabic: سبط) means grandson, and Imam al-Hasan al-Mujtaba (a) and Imam al-Husayn (a) were the Prophet Muhammad's (s) grandsons, each of them is called "Sibt al-Nabi (s)"—that is, grandson of the Prophet (s). When they both are referred to the word "sibt" is used in a dual form: "sibtayn" (two grandsons). Thus one of Imam Ali's (a) titles is "Abu al-Sibtayn", that is, the father of two grandsons (of the Prophet (s)).
- Bayumi Mihran, al-Imama wa al-Ahl al-Bayt, vol. 10, p. 19; Majlisī, Biḥār al-anwār, vol. 2, p. 9.
- Bayumi Mihran, Muhammad. Al-Imama wa al-Ahl al-Bayt. Cairo: Dar al-Nihda al-'Arabiyya, 1995.
- Majlisī, Muḥammad Bāqir al-. Biḥār al-anwār. Second edition. Beirut: Dār Iḥyāʾ al-Turāth al-ʿArabī, 1403 AH.