al-Mutamad fi Usul al-Fiqh
- Author died
- 436 AH
- Editions
- Dār al-Kutub al-‘Ilmīyah
al-Mu'tamad fi Usul al-Fiqh (The Reliable Source in the Principles of Islamic Jurisprudence) is a major treatise on Islamic legal theory composed by the Mu'tazilite theologian and jurist Abu al-Husayn al-Basri (d. 436 AH / 1044 CE) . It represents one of the foundational masterworks of legal methodology according to the scholastic method of the theologians (tariqat al-mutakallimin) .
Composition and Purpose
Prior to writing al-Mu'tamad, Abu al-Husayn had written an extensive commentary on Kitab al-'Umad by his teacher al-Qadi Abd al-Jabbar (d. 415 AH) . In the introduction to al-Mu'tamad, Abu al-Husayn explains that while commenting on al-'Umad, he was obliged to follow its arrangement, which led to repeated issues and the incorporation of subtle speculative theological inquiries (daqiq al-kalam)—such as debates on whether reflection engenders knowledge (tawallud al-nazar) or the precise definitions of necessary and acquired knowledge—that do not strictly belong to jurisprudence . He argued that just as it is inappropriate to fill legal treatises with theological topics like divine unity and justice, legal theory should not be overburdened with abstruse theological disputation .
Consequently, Abu al-Husayn composed al-Mu'tamad as a distinct, restructured work to purge extraneous theological debates, eliminate redundancies, and incorporate supplementary investigations not found in his commentary . Later scholars noted that Ibn Khaldun and others erred in assuming that al-Mu'tamad was merely a commentary or an abridgment of al-'Umad, whereas Abu al-Husayn explicitly designed it as an independent text with differing chapter organization and altered content .
Method and Content
Abu al-Husayn begins al-Mu'tamad with preliminary definitions of jurisprudence (fiqh), principles (usul), and the nature of legal rulings (ahkam), categorizing actions as obligatory (wajib), recommended (mandub), permissible (mubah), prohibited (mahzur or muharram), and discouraged (makruh), along with classifications of good (hasan) and bad (qabih) . The text systematically examines linguistic and legal significations, commands and prohibitions, generality and particularity, textual ambiguity and clarity, prophetic actions, consensus (ijma'), solitary and recurrent transmissions of hadith (akhbar), analogical deduction (qiyas), and the qualifications for independent legal reasoning (ijtihad) . In treating analogical reasoning, the work incorporates insights from his earlier independent treatise Kitab al-Qiyas al-Shar'i .
Reception and Influence
al-Mu'tamad came to be recognized by scholars of legal theory as one of the four foundational pillars of classical usul al-fiqh, alongside al-Qadi Abd al-Jabbar's al-'Umad, al-Juwayni's al-Burhan, and Abu Hamid al-Ghazali's al-Mustasfa .
Later major syntheses drew heavily upon it. Fakhr al-Din al-Razi (d. 606 AH) based his monumental work al-Mahsul largely on al-Mu'tamad and al-Mustasfa, both of which he reportedly committed to memory . Similarly, Sayf al-Din al-Amidi drew upon it when preparing his compendium al-Ihkam fi Usul al-Ahkam . Haji Khalifa noted that Katib Celebi recorded Abu al-Husayn's death year as 463 AH in his entry on the book, which was corrected by editors to 436 AH .
The text was abridged in works such as Tajrid al-Mu'tamad . In modern times, the treatise was edited by Muhammad Hamidullah along with others and published in Damascus (1964–1965), and later published in two volumes edited by Khalil al-Mays in Beirut (1403 AH / 1983 CE) .
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