Sahih al-Bukhari 1255
Sahih al-Bukhari · Book 23: Funerals (Al-Janaa'iz) · To start from the right side while giving a bath to a dead body
Narrated Um 'Atiyya:
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ ، حَدَّثَنَا خَالِدٌ ، عَنْ حَفْصَةَ بِنْتِ سِيرِينَ ، عَنْ أُمِّ عَطِيَّةَ ـ رضى الله عنها ـ قَالَتْ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي غَسْلِ ابْنَتِهِ " ابْدَأْنَ بِمَيَامِنِهَا وَمَوَاضِعِ الْوُضُوءِ مِنْهَا " .
Allah's Messenger (ﷺ) , concerning his (dead) daughter's bath, said, "Start with the right side, and the parts which are washed in ablution."