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."
Sahih al-Bukhari Book 39, Hadith 5
← Previous Hadith `Abdur-Rahman bin `Auf came to us and Allah's Messenger (ﷺ) established a bond of brotherhood between him and Sa`d bin Rabi`a.

Sahih al-Bukhari Book 39, Hadith 4 Next Hadith → A dead person was brought to the Prophet (ﷺ) so that he might lead the funeral prayer for him. He asked, "Is he in debt?" When the people replied in the negative, he led the funeral prayer. Another dead person was brought and he asked, "Is he in debt?" They said, "Yes." He (refused to lead the prayer and) said, "Lead the prayer of your friend." Abu Qatada said, "O Allah's Messenger (ﷺ)! I undertake to pay his debt." Allah's Messenger (ﷺ) then led his funeral prayer.

Sahih al-Bukhari Book 39, Hadith 6