The Book of Prayer - Funerals
11/12. Chapter:
Washing the deceased
Sahih Muslim
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا هُشَيْمٌ، عَنْ خَالِدٍ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ، عَنْ أُمِّ عَطِيَّةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم حَيْثُ أَمَرَهَا أَنْ تَغْسِلَ ابْنَتَهُ قَالَ لَهَا " ابْدَأْنَ بِمَيَامِنِهَا وَمَوَاضِعِ الْوُضُوءِ مِنْهَا " .
Umm 'Atiyya reported that when the Messenger of Allah (ﷺ) asked her to wash his daughter, he told her to start from the right side, and with those parts of the body over which Wudu' is performed.
Reference : Sahih Muslim 939hIn-book reference : Book 11, Hadith 53USC-MSA web (English) reference : Book 4, Hadith 2048