كتاب الكفالة
Read the English translation first, with the original Arabic directly underneath.
Narrated `Asim:
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."
لاَ حِلْفَ فِي الإِسْلاَمِ