Sahih Bukhari Volume 008, Book 073, Hadith Number 106.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 73. Good Manners and Form (Al-Adab)
Narated By 'Asim : I said to Anas bin Malik, "Did it reach you that the Prophet said, "There is no treaty of brotherhood in Islam'?" Anas said, "The Prophet made a treaty (of brotherhood) between the Ansar and the Quraish in my home."