Sahih al-Bukhari 2294
Sahih al-Bukhari · Book 39: Kafalah · The Statement of Allah jala jalaaluhu:"... To those also with whom you have made a pledge, give them their due portion by Wasiya..."
Narrated `Asim:
حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ زَكَرِيَّاءَ ، حَدَّثَنَا عَاصِمٌ ، قَالَ قُلْتُ لأَنَسٍ رضى الله عنه أَبَلَغَكَ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " لاَ حِلْفَ فِي الإِسْلاَمِ " . فَقَالَ قَدْ حَالَفَ النَّبِيُّ صلى الله عليه وسلم بَيْنَ قُرَيْشٍ وَالأَنْصَارِ فِي دَارِي .
I heard Anas bin Malik, "Have you ever heard that the Prophet (ﷺ) said, 'There is no alliance in Islam?' " He replied, "The Prophet (ﷺ) made alliance between Quraish and the Ansar in my house."