Al-Bayhaqi's Grand Sunan: Scope and Purpose

As-Sunan al-Kubra is the magnum opus of Ahmad ibn al-Husayn al-Bayhaqi, the most prolific hadith scholar and Shafi'i jurist of the fifth century of the Islamic calendar. Completed after years of meticulous compilation and analysis, the work contains approximately twenty-one thousand hadiths organized according to the chapters of Islamic jurisprudence, from purification through the full range of legal rulings. It is the largest sunan collection in the hadith literature and one of the most systematically useful for scholars engaged in the study of Islamic law from a hadith perspective.

Al-Bayhaqi's purpose in composing As-Sunan al-Kubra was explicitly juristic: he wanted to provide Islamic jurists — and particularly Shafi'i jurists — with an exhaustive reference for the hadith evidence underlying every significant legal ruling. This purpose shaped both the organization and the content of the work. Unlike the broad compilations of the musannaf genre, which gathered evidence on legal questions without necessarily taking sides, al-Bayhaqi's Sunan systematically presents the evidence in support of Shafi'i legal positions while also engaging with the evidence cited by other schools. This advocacy dimension makes the work both extremely useful and interpretively positioned.

The Sunan al-Kubra is organized into ten major books or sections, each corresponding to a major domain of Islamic law. Within each section, chapters are arranged in the standard jurisprudential sequence, and within each chapter, al-Bayhaqi presents the relevant hadiths in order of their evidentiary quality — typically beginning with the most reliable and moving to the weaker supporting evidence. He also includes the legal opinions of the Companions and the early Successors, which were themselves considered legal evidence in the Shafi'i tradition.

Al-Bayhaqi's commitment to scholarly honesty means that he regularly notes when the hadith evidence does not support the Shafi'i position as clearly as one might wish, or when the evidence actually supports a competing school's position. This intellectual honesty has made the Sunan al-Kubra trusted not just by Shafi'i scholars but by scholars of all legal schools as a reliable record of the hadith evidence on contested legal questions.