al-Ibanah an Usul al-Diyanah
- Author died
- 324 AH
- Editions
- tahqiq al-Usaymi · Ta fawqiya
al-Ibanah 'an Usul al-Diyanah (The Clarification on the Fundamentals of Religion) is a theological treatise composed by Abu al-Hasan al-Ash'ari (d. 324 AH / 936 CE) to establish the orthodox creed of Ahl al-Sunnah wa-l-Hadith and refute rival theological sects .
Title and Composition
The work is recorded under three primary titles across historical manuscripts: al-Ibanah 'an Usul al-Diyanah, al-Ibanah fi Usul al-Diyanah, and al-Tawhid, the last of which appears on copies in Alexandria, Beirut, and Cairo . Another recorded variant of its title is al-Ibanah 'an Shari'at al-Firaq al-Najiyah wa-Mujanabat al-Firaq al-Madhmumah .
The treatise was authored after al-Ash'ari renounced the creed of the Mu'tazilah . Classical biographers and scholars, including Ibn Kathir, Ibn Taymiyyah, and Ibn al-Imad al-Hanbali, transmitted from al-Ash'ari's associates that al-Ibanah was his final theological compilation . In a critical report narrated by Abu Ali al-Ahwazi, al-Ash'ari was said to have written al-Ibanah upon his arrival in Baghdad after presenting his theological arguments against heretical sects to the Hanbali scholar Abu Muhammad al-Barbahari, who replied that he only recognized what had been stated by Ahmad ibn Hanbal .
Scope and Theological Contents
Al-Ash'ari opens the book by rejecting the theological doctrines of the Mu'tazilah, Qadariyyah, Jahmiyyah, Haruriyyah, Rafidah, and Murji'ah, explicitly professing his reliance upon the Quran, the Sunnah of the Prophet ﷺ, the narrations of the Companions, the Successors, and the traditionists (aimmat al-hadith), with specific endorsement of the doctrine of Ahmad ibn Hanbal .
The treatise is organized into thematic chapters addressing contested dogmatic questions:
- The Vision of Allah (Ru'yat Allah): In the chapter titled Bab al-Kalam fi Ithbat Ru'yat Allah Subhanah bi-l-Absar fi al-Akhirah, al-Ash'ari affirms that believers will gaze directly upon Allah with their physical eyes in the Hereafter, exegeting the verse وُجُوهٌ يَوْمَئِذٍ نَاضِرَةٌ إِلَى رَبِّهَا نَاظِرَةٌ (Some faces that Day shall be radiant, looking at their Lord) as ocular sight rather than contemplation or expectation .
- The Speech of Allah: Affirming that the Quran is the uncreated word of Allah that was heard and transmitted, refuting the Mu'tazili stance of its createdness .
- Divine Attributes: Dedicated chapters substantiate the Throne-Ascension (al-Istiwa' 'ala al-'Arsh) and divine transcendence, rejecting figurative reinterpretation (ta'wil)—such as interpreting Istiwa' as conquest (istila'); al-Ash'ari similarly devotes chapters to affirming divine attributes such as the Face (al-Wajh), Eyes (al-'Aynayn), and Hands (al-Yadayn) without modal description (bila kayf) or corporeal resemblance (tamthil) .
- Divine Decree and Predestination: Defending the all-encompassing will and power of Allah over human acts against the Qadariyyah .
Reception and Scholarly Debate
al-Ibanah achieved wide recognition among classical scholars. Ibn Asakir relied extensively on its text in Tabyin Kadhib al-Muftari to demonstrate al-Ash'ari's theological standing and orthodoxy . It was cited by Abu Bakr al-Bayhaqi in al-I'tiqad, transcribed in the handwriting of al-Nawawi, and utilized by al-Dhahabi in al-'Uluww li-l-'Aliyy al-Ghaffar . Ibn Dirbas composed a dedicated defense titled al-Dhab 'an Abi al-Hasan al-Ash'ari affirming that al-Ibanah embodied the settled creed that al-Ash'ari held after repenting from Mu'tazilism .
The book also prompted controversy. Ibn Dirbas recorded that an opponent in Jerusalem denied that the book was authored by al-Ash'ari or claimed that he had composed it during an early literalist phase . Modern Western scholars such as Richard McCarthy and Michel Allard, as well as the 20th-century theologian Muhammad Zahid al-Kawthari, scrutinized its attribution or alleged that al-Ash'ari wrote it only as a political conciliation to contemporary traditionalists, while other scholars, including Hammad al-Ansari, documented the continuous chain of transmission and extensive classical citations confirming its authentic authorship .
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