Sahih Bukhari

Narrated Aisha:The wife of Rifa`a Al-Qurazi came to the Prophet (ﷺ) and said, ""I was Rifa`a's wife, but he divorced me and it was a final irrevocable divorce. Then I married `Abdur-Rahman bin Az-Zubair but he is impotent."" The Prophet (ﷺ) asked her 'Do you want to remarry Rifa`a? You cannot unless you had a complete sexual relation with your present husband."" Abu Bakr was sitting with Allah's Messenger (ﷺ) and Khalid bin Sa`id bin Al-`As was at the door waiting to be admitted. He said, ""O Abu Bakr! Do you hear what this (woman) is revealing frankly before the Prophet (ﷺ) ?