The Book of the Merits of the Companions
44/50. Chapter:
The Prophet (SAW) Established Bonds Of Brotherhood Among His Companions (RA)
Sahih Muslim
حَدَّثَنِي أَبُو جَعْفَرٍ، مُحَمَّدُ بْنُ الصَّبَّاحِ حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، حَدَّثَنَا عَاصِمٌ الأَحْوَلُ، قَالَ قِيلَ لأَنَسِ بْنِ مَالِكٍ بَلَغَكَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ حِلْفَ فِي الإِسْلاَمِ " . فَقَالَ أَنَسٌ قَدْ حَالَفَ رَسُولُ اللَّهِ صلى الله عليه وسلم بَيْنَ قُرَيْشٍ وَالأَنْصَارِ فِي دَارِهِ .
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 2529aIn-book reference : Book 44, Hadith 292USC-MSA web (English) reference : Book 31, Hadith 6144