Sahih al-Bukhari 167
Narrated Um-`Atiya:
That the Prophet (ﷺ) at the time of washing his deceased daughter had said to them, "Start from the right 
side beginning with those parts which are washed in ablution."
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ، عَنْ أُمِّ عَطِيَّةَ، قَالَتْ قَالَ النَّبِيُّ صلى الله عليه وسلم لَهُنَّ فِي غُسْلِ ابْنَتِهِ ‏
"‏ ابْدَأْنَ بِمَيَامِنِهَا وَمَوَاضِعِ الْوُضُوءِ مِنْهَا ‏"‏‏.‏