Urwa told on' A’isha’s authority that God’s Messenger said to her concerning Barira, “Take her and set her free.” Now her husband was a slave, so God’s Messenger gave her her choice and she chose to separate from him; but if he had been free he would not have given her her choice. (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب النكاح / 3198
Hadith Gradingالألبانی:مُتَّفق عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (2563) و مسلم (1504/8)»