From Sahih Bukhari (Hadith 6083):
Narrated `Asim:I said to Anas bin Malik, "Did it reach you that the Prophet (ﷺ) said, "There is no treaty of brotherhood in Islam'?" Anas said, "The Prophet (ﷺ) made a treaty (of brotherhood) between the Ansar and the Quraish in my home
Reference: Bukhari 6083