Sahih Muslim
2529.01

It was said to Anas b. Malik:You must have heard this that Allah's Messenger (ﷺ) said: There is no alliance (hilf) of brotherhood in Islam. Anas said: Allah's Messenger (ﷺ) established the bond of fraternity between the Quraish and the Ansar in his home

2529.02

Anas reported Allah's Messenger (ﷺ) established fraternity between the Quraish and the Ansar in his house at Medina