I said to Anas bin Malik, "Did it reach you that the Prophet (ﷺ) said, "There is no treaty of brotherhood in Islam'?" Anas said, "The Prophet (ﷺ) made a treaty (of brotherhood) between the Ansar and the Quraish in my home."
Sahih al-Bukhari Book 78, Hadith 111
← Previous Hadith When `Abdur-Rahman came to us, the Prophet (ﷺ) established a bond of brotherhood between him and Sa`d bin Ar-Rabi`. Once the Prophet (ﷺ) said, "As you (O `Abdur-Rahman) have married, give a wedding banquet even if with one sheep."

Sahih al-Bukhari Book 78, Hadith 110 Next Hadith → Rifa`a Al-Qurazi divorced his wife irrevocably (i.e. that divorce was the final). Later on `Abdur- Rahman bin Az-Zubair married her after him. She came to the Prophet (ﷺ) and said, "O Allah's Messenger (ﷺ)! I was Rifa`a's wife and he divorced me thrice, and then I was married to `Abdur-Rahman bin AzZubair, who, by Allah has nothing with him except something like this fringe, O Allah's Messenger (ﷺ)," showing a fringe she had taken from her covering sheet. Abu Bakr was sitting with the Prophet (ﷺ) while Khalid Ibn Sa`id bin Al-As was sitting at the gate of the room waiting for admission. Khalid started calling Abu Bakr, "O Abu Bakr! Why don't you reprove this lady from what she is openly saying before Allah's Apostle?" Allah's Messenger (ﷺ) did nothing except smiling, and then said (to the lady), "Perhaps you want to go back to Rifa`a? No, (it is not possible), unless and until you enjoy the sexual relation with him (`Abdur Rahman), and he enjoys the sexual relation with you."

Sahih al-Bukhari Book 78, Hadith 112