Introduction

Imam Aḥmad ibn Ḥanbal (164–241 AH / 780–855 CE) was not only the leading hadith scholar of his age but also the most consequential defender of Atharī theology in the formative period of Islamic creed. His opposition to the Muʿtazilī doctrine of the created Quran, sustained through the ordeal of the Miḥnah under three Abbasid caliphs, gave his theological writings an authority that no later polemicist could easily rival. Al-Radd ʿalā al-Jahmiyyah wa-l-Zanādiqah belongs to this polemical corpus: it was composed in a period when the Jahmīyya and affiliated rationalist sects wielded significant influence at the caliphal court, and when defending Sunni positions on divine attributes carried real personal risk.

The book takes as its central target the Jahmīyya, followers of Jahm ibn Ṣafwān (d. 128 AH), who denied the reality of the divine attributes and asserted the created nature of the Quran. Imam Aḥmad confronts these positions systematically, marshaling Quranic verses, prophetic hadiths, and statements of the Companions and their successors to demonstrate that the Atharī affirmation of divine attributes, without anthropomorphism and without negation, is the authentic doctrine of the Muslim community. The title also explicitly targets the zanādiqah, a term applied to those whose outward Islam concealed heterodox or irreligious convictions. The work thus addresses both theological error and its more radical consequences, treating doctrinal deviation as a serious communal danger.

Al-Radd ʿalā al-Jahmiyyah is a foundational text in the classical literature of creedal refutation (radd). It influenced subsequent works in the same genre, including texts by Ibn Khuzaymah, al-Dārimī, and Ibn Taymiyyah, all of whom built on Imam Aḥmad's arguments while extending them to address new interlocutors. The work is significant not only for its theological content but also for its methodology: Imam Aḥmad grounds every counter-argument in transmitted evidence, resisting the temptation to engage the Jahmīyya on purely philosophical terms, a methodological choice that would define Atharī polemics for centuries.

Readers should approach this text as a historically situated document as well as a theological one. The arguments are crafted to address specific claims circulating in early third-century AH Baghdad, and some passages presuppose familiarity with those claims. Consulting introductory works on the Jahmīyya and the Muʿtazila will enrich the reading considerably. It is also worth noting that Imam Aḥmad's polemical style is direct and uncompromising: he does not soften his critique of positions he regards as contradicting the Quran and Sunnah. This directness is characteristic of the Atharī tradition and reflects the gravity with which early Sunni scholars viewed theological innovation.