question #3 Sahih al-Bukhari 6083, Book 78, Hadith 111 : What role did the Ansar and the Quraish play in the formation of early Islamic community bonds?

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.”