Kitab al-Salah: The Book of Prayer

The chapters on prayer form one of the largest sections of Sahih al-Bukhari and are preceded by an extensive treatment of purification in Kitab at-Taharah. Al-Bukhari understood that the legal and spiritual dimensions of salah are inseparable from the conditions that make it valid, so before a single chapter on prayer itself, he covers in detail the rulings of wudu, ghusl, tayammum, the removal of impurities, and the states that require purification.

Kitab at-Taharah begins with the famous hadith that purification is half of faith, establishing from the outset that physical cleanliness is not a peripheral concern but is tied to the very root of the believer's relationship with Allah. Al-Bukhari then works through the specific requirements of ritual purity with characteristic attention to detail, citing hadiths that cover the proper method of wudu, what nullifies it, and the circumstances under which tayammum (dry ablution with clean earth) is permitted.

When Kitab as-Salah begins, al-Bukhari opens with the chapters on the sacred mosque in Mecca and the direction of prayer, before moving to the times of the five daily prayers. The hadith of Jibril teaching the Prophet the prayer times by leading him in prayer on two consecutive days — once at the earliest permissible time and once at the latest — appears here and serves as the primary basis for understanding when each prayer must be performed.

The call to prayer (adhan) occupies several chapters. Al-Bukhari records the famous account of Abdallah ibn Zayd, who saw the wording of the adhan in a dream, brought it to the Prophet, and was told to teach it to Bilal since Bilal's voice was stronger. The adhan and iqamah — with their precise wordings — are recorded in multiple narrations, and al-Bukhari's chapter headings here reflect his concern for distinguishing the wording accepted by the majority from variants that were later regarded as weak.

The salah itself is covered chapter by chapter through every element: the opening takbir, the standing position, the recitation of al-Fatiha (with a notable chapter asserting that recitation of al-Fatiha is obligatory behind the imam), the various forms of ruku and sujud, the tashahhud, and the salam. Each chapter is supported by multiple hadiths showing how the Prophet performed prayer, and the recurring reports of Companions correcting one another's prayer positions underscore that the details were carefully preserved from the earliest generation.

Among the most important individual hadiths in this section are those describing the prayer of fear (salah al-khawf) during battle, the prayer during eclipse, the prayer for rain (salah al-istisqa), and the Friday prayer. Al-Bukhari also devotes chapters to the rulings of the mosque — what is permissible inside it and what is not — and to the virtues of prayer in congregation versus prayer alone, with the famous hadith that prayer in congregation exceeds prayer alone by twenty-seven degrees.

The Book of Prayer in Sahih al-Bukhari is a primary source for every madhab's treatment of salah. Its hadiths are cited in every major fiqh manual, and the slight differences in how various schools understand certain narrations account for many of the well-known juristic differences in prayer across the Muslim world.