The Book of the Merits of the Companions
حَدَّثَنِي أَبُو مَعْمَرٍ، إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ الْهُذَلِيُّ حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنِ ابْنِ أَبِي مُلَيْكَةَ، عَنِ الْمِسْوَرِ بْنِ مَخْرَمَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " إِنَّمَا فَاطِمَةُ بَضْعَةٌ مِنِّي يُؤْذِينِي مَا آذَاهَا " .Miswar b. Makhramah reported Allah's Messenger (ﷺ) as saying:Fatima is a part of me. He in fact tortures me who tortures her
From Sahih Muslim, whose reports the scholars accept as authentic.