Sunan Ibn Majah, Book 10, Hadith 2158 (In-Book) ⓘ
It was narrated from 'Aishah that the Prophet said: "The divorce of a slave woman is twice, and her (waiting) period is two menstrual cycles." Abu 'Asim said: "I mentioned this to Muzahir and said: 'Tell me what you told Ibn Juraij.' So he told me, narrating from Qasim from 'Aishah, that the Prophet said: 'The divorce of a slave woman is twice, and her (waiting) period is two menstrual cycles."'
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا أَبُو عَاصِمٍ، حَدَّثَنَا ابْنُ جُرَيْجٍ، عَنْ مُظَاهِرِ بْنِ أَسْلَمَ، عَنِ الْقَاسِمِ، عَنْ عَائِشَةَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " طَلاَقُ الأَمَةِ تَطْلِيقَتَانِ وَقُرْؤُهَا حَيْضَتَانِ " . قَالَ أَبُو عَاصِمٍ فَذَكَرْتُهُ لِمُظَاهِرٍ فَقُلْتُ حَدِّثْنِي كَمَا حَدَّثْتَ ابْنَ جُرَيْجٍ . فَأَخْبَرَنِي عَنِ الْقَاسِمِ عَنْ عَائِشَةَ عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " طَلاَقُ الأَمَةِ تَطْلِيقَتَانِ وَقُرْؤُهَا حَيْضَتَانِ " .
also referenced under: Hadith 2080 (Reference) & Volume 3, Book 10, Hadith 2080 (DarusSalam)