وَعَنْ أَسْمَاءَ بِنْتِ عُمَيْسٍ رَضِيَ اَللَّهُ عَنْهَا
«أَنَّ فَاطِمَةَ عَلَيْهَا اَلسَّلَامُ أَوْصَتْ أَنْ يُغَسِّلَهَا عَلِيٌّ رَضِيَ اَللَّهُ تَعَالَى عَنْهُ»
Fatimah (RAA) (the daughter of the prophet (sallallahu alayhi wa sallam) made a will that Ali (RAA) was to wash her when she dies. Related by Ad-Daraqutni.
Bulugh al-Maram 660, Book 3, Funerals, Hadith 20. 1 min read