Narrated Ibn 'Umar (RA): The divorce of a slave-woman occurs by saying it (the divorce word) twice, and her 'Iddah (waiting period) is two menses. [Reported by ad-Daraqutni] . He reported it as Marfu' (a saying of the Prophet) and graded it Da'if (weak). Abu Dawud, at-Tirmidhi and Ibn Majah reported the aforesaid Hadith from the narration of 'Aishah (RA), which al-Hakim graded as Sahih (authentic), but the Hadith scholars disagreed with him, and they agreed that it is Da'if (weak).