Introduction

Abū al-Ḥasan ʿAlī ibn Aḥmad al-Wāḥidī al-Nīsābūrī (d. 468 AH / 1076 CE) was a distinguished Quranic scholar of the Shāfiʿī school, studying under scholars of the caliber of Abū Isḥāq al-Thaʿlabī in Khurasan. He produced three works on Quranic commentary, ranging in length from a concise summary to an extensive multi-volume tafsīr, and he was regarded by later scholars as a leading authority in Quranic sciences. His standing in the tradition is illustrated by the fact that his work on the causes of revelation became, within decades of its composition, the foundational reference for all subsequent scholarship in this field. Asbāb al-Nuzūl, completed in the fifth Islamic century, was the first comprehensive systematic collection devoted entirely to documenting the circumstances and events that occasioned the revelation of specific Quranic verses, and it has never been displaced from its position as the primary classical authority on this subject.

The discipline of asbāb al-nuzūl, the study of the occasions or causes of Quranic revelation, occupies an essential place within the broader sciences of the Qurʾān. Many Quranic verses were revealed in direct response to specific events, questions posed to the Prophet (peace be upon him), disputes among the Companions, or situations that required divine guidance. Knowing the historical context of a verse is not merely supplementary information; in many cases it is indispensable for correct interpretation, helping to determine the scope of a ruling, the intended audience of an address, or the precise meaning of an expression. Al-Wāḥidī gathered the relevant traditions from the hadith literature, arranged them according to the order of the Quranic chapters, and assessed their transmission. His collection covers hundreds of verses and draws on an extensive corpus of reports transmitted through the Companions and their successors, presenting the material in a form that subsequent commentators and jurists could readily consult.

The scholarly significance of this work cannot be overstated. Al-Suyūṭī, writing in the ninth Islamic century, acknowledged al-Wāḥidī as the imam of the field, and virtually every major tafsīr from the classical period onward cites Asbāb al-Nuzūl as a primary reference. Later scholars, including al-Suyūṭī himself in his Lubāb al-Nuqūl, produced refinements and supplements to al-Wāḥidī's collection, but they built upon rather than replaced it. The work also carries methodological significance: al-Wāḥidī himself insisted, in his prefatory remarks, that one should not speak about the causes of revelation without sound transmission from those who witnessed the revelation, a principle that set an important standard for scholarly rigor in this discipline. Readers familiar with classical tafsīr literature will recognize his reports appearing across the works of al-Ṭabarī, Ibn Kathīr, al-Qurṭubī, and others.

Those approaching this book should understand its function as a reference work rather than a continuous narrative. It is organized by Quranic chapter and verse, and readers will benefit most from consulting it alongside a copy of the Qurʾān or a tafsīr, looking up the occasion of revelation for verses they are studying rather than reading straight through from beginning to end. The reports vary in their chain strength, and al-Wāḥidī does not always provide explicit grading, so consulting a supplementary hadith reference or a scholar's notes is advisable when a specific report is being relied upon for legal or exegetical purposes. Despite these considerations, the book remains an indispensable tool for any serious student of the Qurʾān, offering direct access to the historical context that classical Muslim scholars considered foundational for understanding the divine word.