Yahya related to me from Malik from Rabia ibn Abi Abd ar-Rahman that Muhammad ibn Ali ibn al-Husayn said, "Fatima, the daughter of the Messenger of Allah ﷺ weighed the hair of Hasan and Husayn, and gave away in sadaqa the equivalent weight in silver."  

أَنَّهُ قَالَ وَزَنَتْ فَاطِمَةُ بِنْتُ رَسُولِ اللَّهِ ﷺ شَعَرَ حَسَنٍ وَحُسَيْنٍ فَتَصَدَّقَتْ بِزِنَتِهِ فِضَّةً  

[Machine] Fatimah, the daughter of the Messenger of Allah ﷺ, is reported to have sacrificed a sheep for Hassan and Hussein when she gave birth to them, then shaved their hair. She then donated (charitably) the equivalent weight of their hair in silver.  

أَنَّ فَاطِمَةَ بِنْتَ رَسُولِ اللهِ ﷺ ذَبَحَتْ عَنْ حَسَنٍ وَحُسَيْنٍ حِينَ وَلَدَتْهُمَا شَاةً وَحَلَقَتْ شُعُورَهُمَا ثم تَصَدَّقَتْ بِوَزْنِهِ فِضَّةً