كتاب الجنائز
11  
The Book of Prayer - Funerals
(12)
Chapter: Washing the deceased
(12)
باب فِي غَسْلِ الْمَيِّتِ ‏
Sahih Muslim 939 h

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.

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 ‏"‏ ‏.‏
Reference : Sahih Muslim 939h
In-book reference : Book 11, Hadith 53
USC-MSA web (English) reference : Book 4, Hadith 2048
  (deprecated numbering scheme)