Sahih Bukhari Volume 004, Book 056, Hadith Number 696.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 56. Virtues and Merits of the Prophets (PBUH) and his Companions
Narated By Abu Huraira : Once Allah's Apostle was asked, "Who is the most honorable amongst the people?" He said, "The most righteous (i.e. Allah-fearing) amongst you." They said, "We do not ask you about this." He said, "Then Joseph, the prophet of Allah."