Kitab al-Isti'adhah and Kitab al-Iman

The final major thematic sections of Sunan an-Nasai — Kitab al-Isti'adhah (Seeking Refuge with Allah) and Kitab al-Iman wa Shara'i'uh (Faith and Its Laws) — present a distinctive combination of spiritual practice and theological content that reflects an-Nasai's broader vision for his collection. These sections appear toward the end of al-Mujtaba and carry a reflective, inward-looking quality that contrasts with the heavily juridical material dominating most of the Sunan.

Kitab al-Isti'adhah collects hadiths on seeking refuge with Allah from various harmful things: the punishment of the grave, the torment of Hellfire, the trial of the Dajjal, the evil of the self, the evil of the devil, poverty, debt, and sin. The Prophet's comprehensive supplications for protection appear here in multiple variants, and an-Nasai's careful evaluation of the chains allows readers to identify the most strongly authenticated forms of each supplication.

The chapters on seeking refuge at the time of prayer — reciting 'A'udhu billahi min al-shaytan il-rajim' before beginning the recitation of Quran — address a juristic question that was contested among the early scholars: whether this seeking of refuge is obligatory, recommended, or merely permissible in prayer. An-Nasai's collection of hadiths supporting the practice from multiple Companions established it as a well-attested sunnah, and the chapter became a standard reference for scholars affirming the recommendation.

The supplications for protection from specific fears — seeking refuge from cowardice, from miserliness, from being returned to the worst period of old age, from the trial of poverty and the trial of wealth — give the section a biographical quality, showing the Prophet as a person who taught his Companions specific words for specific anxieties. This practical dimension of prophetic supplication is preserved with unusual completeness in an-Nasai's collection.

Kitab al-Iman wa Shara'i'uh — the Book of Faith and Its Laws — is an-Nasai's treatment of what the content of Islamic faith requires in terms of belief and action. The section is notably thorough in covering the 'branches of faith' tradition. An-Nasai records and grades the various versions of the hadith on faith's branches — with different narrations giving slightly different numbers — and then works through specific branches individually: prayer, fasting, honesty, modesty, and others. This organization made his section on iman more juristically structured than those of most other major collections.

The chapters on the signs of hypocrisy and their avoidance bring the section to a practical ethical conclusion. The Prophet's description of the hypocrite's three signs — lying when speaking, breaking promises, and betraying trusts — is presented with an-Nasai's characteristic chain analysis, and the variants in which the Prophet extended this description to four or five signs are recorded alongside the primary three-sign version with notes on which versions are most strongly supported.

The combination of seeking refuge and affirming faith as the closing themes of an-Nasai's Sunan is not coincidental. In the Islamic tradition, authentic faith is both a theological affirmation and a continuous spiritual act — the believer is constantly seeking protection from the forces that would weaken or corrupt it. An-Nasai's decision to end his collection with these sections reflects his understanding that the purpose of hadith knowledge is not merely legal expertise but the cultivation of a life oriented entirely toward Allah.