The Question
Da’a’im al-Islam (‘The Pillars of Islam’) is the single most important book of law in the Dawoodi Bohra tradition. It was composed in the tenth century CE by al-Qadi al-Nu’man ibn Muhammad (d. 363 AH / 974 CE), the chief judge of the Fatimid state, and it became the official legal code of the Fatimid caliphate and, after the Tayyibi succession, the enduring foundation of Bohra fiqh in matters of worship, ritual, and transactions. The debate concerns how its authority is grounded: by what standard does a community know that the rulings in Da’a’im faithfully convey the teaching of the imams?
The question matters because different Shia traditions answer it with different methods. Twelver and Sunni jurisprudence built their reliability largely on isnad, the named chain of narrators by which a saying is traced back to the Prophet or an imam. Da’a’im, by contrast, presents its traditions without such chains and, in the reading of its critics, draws almost entirely on early authorities. Whether that method weakens or simply differs from isnad-based scholarship is the heart of the dispute.
The Twelver Critique
The Twelver critique, set out in Ali Azhar Arastu’s booklet examining the Ismaili imams and the Bohras, advances two linked observations. First, al-Qadi al-Nu’man served four Fatimid imam-caliphs, al-Mahdi, al-Qa’im, al-Mansur, and al-Mu’izz, across roughly fifty years, yet Da’a’im records no sayings transmitted from those living imams; the traditions it reports effectively halt at Imam Ja’far al-Sadiq and the earlier imams. From this the critique draws the claim that the Fatimid imams contributed no fresh juristic knowledge of their own, which it presents as inconsistent with the elevated status the Ismaili tradition assigns them. Second, the critique notes that Da’a’im gives no isnad, the documented chains of transmitters on which Twelver hadith criticism depends to test a report’s authenticity. Without such chains, the argument runs, the reliability of the collection cannot be verified by the ordinary tools of hadith scholarship. The critique frames these as questions about epistemology and method rather than about al-Nu’man’s personal learning, which it does not dispute.
The Ismaili-Tayyibi Response
The Ismaili-Tayyibi tradition presents Da’a’im’s authority in its own terms. In this account the book was not a private compilation but a state code prepared under the direct supervision of Imam al-Mu’izz li-Din Allah, who is held to have reviewed and authorized its contents; the imam’s sanction, on this view, supplies the authority that an isnad supplies elsewhere, because the living imam is himself the guarantor of right teaching. Ismaili epistemology rests on the principle of ta’lim, the authoritative instruction of the rightful imam of the age, rather than on the reconstruction of a transmission chain from the past. Because the imam’s knowledge is regarded as continuous and infused (the doctrine of ta’yid, divine support), a saying validated by him needs no external chain to certify it. The tradition further holds that al-Nu’man deliberately selected traditions accepted across the whole household of the Prophet rather than narrowly partisan reports, so as to build the law on a broad and shared foundation. The Quranic command to obey God, the Messenger, and ‘those vested with authority among you’ (4:59) is read as the warrant for this imam-centered method.
Scholarly Assessment
Mainstream academic historians treat Da’a’im as a deliberately constructed instrument of Fatimid statecraft rather than a hadith collection of the conventional type. Ismail Poonawala, the leading cataloguer of Ismaili literature, and Farhad Daftary, the field’s principal historian, describe it as the official code of an actually governing imamate, composed to standardize law across the empire, and they note that its omission of isnad reflects a coherent Ismaili theory of authority centered on the living imam rather than any failure of scholarship; on this reading its method differs from, but is not inferior to, isnad-based works. Scholars including Wilferd Madelung and Heinz Halm have likewise studied al-Nu’man as a careful jurist and historian whose voluminous writings shaped Fatimid institutions. Academics are clear that the underlying disagreement is a theological one about the basis of religious authority, which historical method can describe but cannot adjudicate; whether imam-sanction or documented isnad yields more reliable law is treated as a contested confessional question, not a settled finding.
See also: Seerah Al Qadi Al Numan, Scholarly Debates Overview, Fatimid Caliphate, Isma Infallibility And The Imamate, Bayah And Walayah