Sahih Bukhari Volume 009, Book 092, Hadith Number 386.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 92. Holding Fast to the Qur'an and Sunnah
Narrated By Hammam : Hudhaifa said, "O the Group of Al-Qurra! Follow the straight path, for then you have taken a great lead (and will be the leaders), but if you divert right or left, then you will go astray far away."