Ṣaḥīḥ al-Bukhārī (Arabic: صحيح البخاري), is one of the Kutub al-Sittah (six major hadith collections) of Sunni Islam. These prophetic traditions, or hadith, were collected by the Persian Muslim scholar Muhammad al-Bukhari, after being transmitted orally for generations. Sunni Muslims view this as one of the three most trusted collections of hadith along with Sahih Muslim and Muwatta Imam Malik. In some circles, it is considered the most authentic book after the Quran. The Arabic word sahih translates as authentic or correct The actual title of the book commonly referred to as Sahih al-Bukhari, according to Ibn al-Salah, is: al-Jaami’ al-Sahih al-Musnad al-Mukhtasar min Umur Rasool Allah wa sunanihi wa Ayyamihi. A word for word translation is: The Abridged Collection of Authentic Hadith with Connected Chains regarding Matters Pertaining to the Prophet, His practices and His Times. Ibn Hajar al-Asqalani mentioned the same title replacing the word umur, matters, with hadith Al-Bukhari traveled widely throughout the Abbasid empire from the age of 16, collecting those traditions he thought trustworthy. It is said that al-Bukhari collected over 300,000 hadith and included only 2,602 traditions in his Sahih. At the time when Bukhari saw [the earlier] works and conveyed them, he found them, in their presentation, combining between what would be considered sahih and hasan and that many of them included daʻīf hadith. This aroused his interest in compiling hadith whose authenticity was beyond doubt. What further strengthened his resolve was something his teacher, hadith scholar Ishaq ibn Ibrahim al-Hanthalee – better known as Ishaq Ibn Rahwayh – had said. Muhammad ibn Ismaa’eel al-Bukhari said, "We were with Ishaq Ibn Rahwayh who said, ‘If only you would compile a book of only authentic narrations of the Prophet.’ This suggestion remained in my heart so I began compiling the Sahih." Bukhari also said, "I saw the Prophet in a dream and it was as if I was standing in front of him. In my hand was a fan with which I was protecting him. I asked some dream interpreters, who said to me, ‘You will protect him from lies.’ This is what compelled me to produce the Sahih."
The book covers almost all aspects of life in providing proper guidance of Islam such as the method of performing prayers and other actions of worship directly from the Islamic prophet Muhammad. Bukhari finished his work around 846, and spent the last twenty-four years of his life visiting other cities and scholars, teaching the hadith he had collected. In every city that he visited, thousands of people would gather in the main mosque to listen to him recite traditions. In reply to Western academic doubts as to the actual date and authorship of the book that bears his name, scholars point out that notable hadith scholars of that time, such as Ahmad ibn Hanbal (855 CE/241 AH), Yahya ibn Ma'in (847 CE/233 AH), and Ali ibn al-Madini (848 CE/234 AH), accepted the authenticity of his book and that the collection's immediate fame makes it unlikely that it could have been revised after the author's death without historical record.
During this period of twenty-four years, Bukhari made minor revisions to his book, notably the chapter headings. Each version is named by its narrator. According to Ibn Hajar al-Asqalani in his book Nukat, the number of hadiths in all versions is the same. The most famous one today is the version narrated by al-Firabri (d. 932 CE/320 AH), a trusted student of Bukhari. Al-Khatib al-Baghdadi in his book History of Baghdad quoted Firabri as saying: "About seventy thousand people heard Sahih Bukhari with me".
Firabri is not the only transmitter of Sahih al-Bukhari. There were many others that narrated that book to later generations, such as Ibrahim ibn Ma'qal (d. 907 CE/295 AH), Hammad ibn Shaker (d. 923 CE/311 AH), Mansur Burduzi (d. 931 CE/319 AH) and Husain Mahamili (d. 941 CE/330 AH). There are many books that noted differences between these versions, the best known being Fath al-Bari.