Sahih Bukhari, a compilation done by Imam Bukhari, is the most authentic collection of Ahadith (Sayings of Muhammad S).
Imam Bukhari memorized more than 200,000 traditions of the Messenger of Allah, Muhammad S, and had collected and written over 300,000 of them. Imam Bukhari, in his quest for seeking knowledge about the traditions of the Messenger of Allah, Muhammad S; studied under numerous teachers.
Imam Bukhari carefully researched the authenticity of each of the Hadith (Saying of Muhammad S) he had painstakingly collected. He devised his own strigent system to examine the entire chain of narrators for any possible weakness, and outright rejected the Hadith (Saying of Muhammad S) if it deed not meet the standard of his scrutiny.
Sahih Bukhari, the life-long work Imam Bukhari, is a compilation of 7275 Ahadith (Sayings of Muhammad S). Excluding the repeated ones, the number of Ahadith (Sayings of Muhammad S) comes to about 4,000.
All ‘Ulama” (Religious Scholars) agree on the authenticity of Sahih Bukhari, and consider it the most important book.
Besides traveling to Makkah and Madinah, Imam Bukhari visited Egypt, Hijaz, Kufa, Baghdad and many other seats of learning for his research.
Full name of Imam Bukhari was Abu Abdullah Muhammad Ibn Isma’il Ibn Ibrahim Ibn Mughirah Ibn Bardizbah Al-Bukhari. He was born on the 13th of Shawwal in 194H (Hijrah) (810 CE), in Bukhara in the territory of Khurasan (West Turkistan), thus given him his title Bukhari.
He died on 30^th of Ramadan, 256H (Hijrah) (31 August 870CE) in Bukhara, where he had settled during the final phase of his life.