their sermons(1): “The infallible Imam, the known Mahdī, whose coming You foretold in the explicit terms of Your revelation, whom You encompassed with radiant light and manifest justice, and who filled creation with equity and justice just as it had been filled with oppression and tyranny.”
This man who bore the title al-Mahdī appeared sometime between 503 and 509 AH(2) and died in 524 AH. He claimed descent(3) from al-Hasan, for he was well versed in hadith and therefore claimed that he was the foretold one. But this was not so, nor did he fill the whole earth with equity or justice. Rather, he became involved in reprehensible matters, though he also did some good things.
Before him, Ubayd Allah(4) ibn Maymūn al-Qaddāh(5) had also claimed to be the Mahdī, but he did not
(1) (A) and (B) read: “in their sermon”; all other manuscripts read: “in the sermon.”
(2) (A), (B), (S), and (R) read: “509 AH”; (H) reads: “559 AH.” The biography of Ibn Tūmart appeared earlier, where I noted that his year of birth is disputed. He died in 524 AH, aged between fifty-one and fifty-five.
(3) (N) and (M) read: “was said to be descended.”
(4) (H) reads: “Abd Allah.”
(5) By this, Ibn Taymiyya means Ubayd Allah al-Mahdī, whom some historians consider a descendant of Abd Allah ibn Maymūn al-Qaddāh. Ibn Tāhir al-Baghdādī calls him “Saīd ibn al-Husayn ibn Ahmad ibn Abd Allah ibn Maymūn ibn Daysān al-Qaddāh.” It is reported that he changed his name and lineage and told his followers that he was “Ubayd Allah ibn al-Husayn ibn Ismāīl ibn Jafar al-Sādiq.” Others state that this Ubayd Allah was the son of a Jewish man who worked as a blacksmith in Salamiyya. After his father died, his mother married an Alid nobleman, who raised the child; when he grew up, he claimed Alid descent. Ubayd Allah was born in 259 AH and died in 322 AH. He founded his state in the Maghrib—known as the Fatimid state—in 297 AH, and his successors conquered Egypt under the Fatimid al-Muizz li-Dīn Allah in 358 AH. See: *al-Farq bayn al-Firaq*, p. [0–9] 70; Muhammad Kāmil Husayn, *Tāifat al-Ismāīliyya*, Cairo, 1959; Alī Sāmī al-Nashshār, *Nashat al-Fikr al-Falsafī fī al-Islām*, 2:478–511 (al-Maārif, Cairo, 1964); Muhammad Abd Allah Inān, *al-Hākim bi-Amr Allah*, pp. 47–75 (Lajnat al-Talīf wa-l-Tarjama wa-l-Nashr, Cairo, 1379/1959); and *al-Alām*, 4:286, 353.