The Authority of the Sunnah

The chapter of the Risalah devoted to the Sunnah represents one of al-Shafi'i's most significant scholarly achievements. Against voices in his era that were skeptical of hadith or inclined to reduce the Sunnah to a secondary and largely optional guide, al-Shafi'i mounted a sustained argument for the Sunnah's binding authority — an authority grounded not in scholarly tradition alone but in the Quran's own commands.

The cornerstone of his argument is found in the verse of Surat al-Najm: "He does not speak from his own desire. It is nothing but revelation revealed" (53:3-4). Al-Shafi'i read this verse as establishing that the Prophet's speech, when it concerns religion, carries the weight of revelation. This does not make the Sunnah identical to the Quran — the two differ in how they were transmitted and in the specific nature of their miraculous quality — but it means that following the Sunnah is itself a Quranic obligation. The command to obey the Messenger (4:59) is not a contingent instruction that a community might choose to honor or set aside. It is an absolute command whose violation constitutes disobedience to Allah.

Al-Shafi'i then turns to the typology of the Sunnah. He identifies hadiths that confirm and reinforce what the Quran has already stated clearly. He identifies hadiths that specify the Quran's general statements, giving the broad Quranic commands their practical, actionable shape. The Quran commands prayer without specifying its times or the number of its units. The Quran commands zakah without specifying its thresholds or rates. The Sunnah provides all of this specification, and al-Shafi'i argues that this explanatory function is not incidental but part of the design of revelation. Allah revealed a Book and sent alongside it a Prophet whose words and actions would show the community how to live by that Book.

There is also a third category: hadiths that establish rulings for which there is no explicit Quranic parallel. Al-Shafi'i's position on these is one of his most contested but most consistent: since the Sunnah is itself revelation, the Prophet has the authority to establish rulings in his own right. A hadith that is authentically established cannot be set aside simply because no Quranic verse addresses the same topic. The Sunnah legislates as well as clarifies.

Al-Shafi'i also addresses the relationship between solitary (ahad) hadiths and the requirement of certainty in legal derivation. He defended the use of reliably transmitted solitary hadiths for deriving legal rulings even when those hadiths do not reach the level of mass transmission (mutawatir). This was a position that placed him in tension with some contemporaries, and he argued it carefully: if a hadith meets the conditions of reliability — a trustworthy, unbroken chain of narrators who possessed the capacity to transmit accurately — then acting on it is obligatory, even if only a small number of narrators transmitted it.

The upshot of this section is that the Sunnah is not a storehouse of suggestions or pious practices that the Muslim may take or leave. It is the second pillar of the sacred law, inseparable from the Quran in function if distinct from it in form. Any legal methodology that marginalizes the Sunnah has, for al-Shafi'i, already undermined its own foundations.