Hadith 10:707
Abu Bakr narrated to us, he said: Hafs narrated to us, from Hisham, from his father, from Jumhan, from Uthman, who said: "Khul' (divorce initiated by the wife) is an irrevocable divorce."
حدثنا أبو بكر قال نا حفص عن هشام عن أبيه عن جمهان عن عثمان قال الخلع تطليقة بائنة