Introduction

Ibn Rajab al-Ḥanbalī, whose full name was Zayn al-Dīn ʿAbd al-Raḥmān ibn Aḥmad al-Baghdādī al-Dimashqī, was born in Baghdad in 736 AH (1335 CE) and died in Damascus in 795 AH (1393 CE). He was among the foremost scholars of the Ḥanbalī school in the eighth Islamic century, a student of Ibn al-Qayyim's students and a direct inheritor of the intellectual legacy of Ibn Taymiyyah. He combined rigorous legal training with deep expertise in hadith criticism, and his works reflect both precision and an acute sensitivity to the spiritual dimensions of Islamic practice. He lived through a period of political turbulence in the Levant and Egypt, and much of his scholarship is colored by a concern for preserving the authentic Sunni tradition against both theological deviation and spiritual laxity.

This treatise addresses ikhlāṣ, the Arabic term for sincerity or purity of intention, which Islamic scholars across the schools have identified as the indispensable internal condition for the acceptance of any deed. The central argument of the work is that no external act of worship, however correct in its outward form, possesses any weight with Allah unless it is performed solely for His sake, free from the contamination of riyāʾ, which is the desire to be seen or praised by others. Ibn Rajab draws extensively on Quranic verses, authenticated prophetic traditions, and the statements of the early Muslim generations to build a comprehensive account of what sincerity demands and how its opposite, ostentation, corrupts the spiritual value of deeds. He distinguishes between major riyāʾ, which nullifies worship entirely, and subtler forms that diminish its reward without voiding it, and he offers practical guidance on how a believer may examine and purify his intentions.

The scholarly significance of this work lies in its integration of legal and spiritual analysis within a strictly text-based framework. Unlike some later Sufi treatments of ikhlāṣ that drift toward speculative mysticism, Ibn Rajab anchors every claim in hadith and the practice of the Salaf. The treatise became a foundational reference in the genre of works concerned with the diseases of the heart, standing alongside other Ḥanbalī contributions to Islamic spiritual ethics such as Ibn al-Qayyim's 'Iddat al-Ṣābirīn and Madārij al-Sālikīn. Scholars of later generations, including those working in the tradition of Ibn ʿAbd al-Wahhāb and subsequent reformist currents, cited it frequently when addressing the conditions for the acceptance of deeds.

The reader approaching this work will benefit most by treating it as both a theological exposition and a practical manual for spiritual self-examination. Each section warrants slow, reflective reading, with attention to the prophetic narrations that form the evidentiary backbone of the argument. It is advisable to read the text alongside its Quranic references and to consult the relevant chapters of the major hadith collections cited. The work assumes familiarity with the basic obligations of Islamic worship but is accessible to any serious student willing to give it careful attention. Reading it with the explicit intention of self-correction, rather than mere academic study, is most consistent with the purpose for which it was written.