Bulugh al-Maram, Book 3, Hadith 576 (English) ⓘ
Asma’ bint ’Umais (RAA) narrated that Fatimah (RAA) (the daughter of the prophet made a will that ‘Ali (RAA) was to wash her when she dies.’ Related by Ad-Daraqutni.
وَعَنْ أَسْمَاءَ بِنْتِ عُمَيْسٍ رَضِيَ اَللَّهُ عَنْهَا: { أَنَّ فَاطِمَةَ عَلَيْهَا اَلسَّلَامُ أَوْصَتْ أَنْ يُغَسِّلَهَا عَلِيٌّ رَضِيَ اَللَّهُ تَعَالَى عَنْهُ } رَوَاهُ اَلدَّارَقُطْنِيُّ 1. 1 - حسن. رواه الدارقطني (2/79/12).
also referenced under: Book 3, Hadith 20 (In-Book)