Narrated Ibn 'Umar:
that the Messenger of Allah (ﷺ) made bonds of brotherhood among his Companions. So 'Ali came crying saying: O Messenger of Allah! You have made a bond of brotherhood among your Companions, but you have not made a bond of brotherhood with me and anyone. So the Messenger of Allah (ﷺ) said to him: I am your brother, in this life and the next.