Hadith 10:747
Abu Bakr narrated to us, he said: Ibn Idris narrated to us, from Hisham, from Ibn Sirin, who said: Khul' (divorce initiated by the wife) is permissible without the authority (of the Sultan/judge).
حدثنا أبو بكر قال نا بن إدريس عن هشام عن بن سيرين قال الخلع جائز دون السلطان