Sahih al-Bukhari
Imam Bukhari, from the age of 16 traveled a lot of places to collect hadith reports. It is reported that he collected nearly 600,000 ahadith in his collection. Experts say that the number of full-isnad sayings mount up to roughly 7,397, and without considering repetitions of the same report, the number of hadith sayings reduces to roughly 2,602.