[Machine] Fatimah, the daughter of the Messenger of Allah ﷺ , weighed the hair of Hasan, Husain, Zainab, and Um Kulthum. She then gave that weight in silver as charity. This narration is reported by Rabee'ah, from Muhammad bin Ali bin Husain, regarding Hasan and Husain (peace be upon them).
أَنَّهُ قَالَ وَزَنَتْ فَاطِمَةُ بِنْتُ رَسُولِ اللهِ ﷺ شَعْرَ حَسَنٍ وَحُسَيْنٍ وَزَيْنَبَ وَأُمِّ كُلْثُومٍ فَتَصَدَّقَتْ بِزِنَةِ ذَلِكَ فِضَّةً وَرُوِّينَاهُ عَنْ رَبِيعَةَ عَنْ مُحَمَّدِ بْنِ عَلِيِّ بْنِ حُسَيْنٍ فِي حَسَنٍ وَحُسَيْنٍ عَلَيْهِمَا السَّلَامُ