Hadith 4086
Chapter 34: The appearance of the Mahdi - كتاب الفتن
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَحْمَدُ بْنُ عَبْدِ الْمَلِكِ، حَدَّثَنَا أَبُو الْمَلِيحِ الرَّقِّيُّ، عَنْ زِيَادِ بْنِ بَيَانٍ، عَنْ عَلِيِّ بْنِ نُفَيْلٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، قَالَ كُنَّا عِنْدَ أُمِّ سَلَمَةَ فَتَذَاكَرْنَا الْمَهْدِيَّ فَقَالَتْ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ " الْمَهْدِيُّ مِنْ وَلَدِ فَاطِمَةَ " .
It was narrated that Sa'eed bin Musayyab said:
"We were with Umm Salamah and we were discussing Mahdi. She said: 'I heard the Messenger of Allah (ﷺ) say: "Mahdi will be one of the descendents of Fatimah."
Reference : Sunan Ibn Majah 4086
In-book reference : Book 36, Hadith 161