(50) باب مُؤَاخَاةِ النَّبِيِّ صلى الله عليه وسلم بَيْنَ أَصْحَابِهِ رضى الله تعالى عنهم
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.
Reference: Sahih Muslim 2529 a
In-book reference: Book 44, Hadith 292
USC-MSA web (English) reference(deprecated numbering scheme): Book 31, Hadith 6144