Ablutions (Wudu')
4/31. Chapter:
While performing ablution or taking a bath one should start from the right side of the body
Sahih Bukhari
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي أَشْعَثُ بْنُ سُلَيْمٍ، قَالَ سَمِعْتُ أَبِي، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُعْجِبُهُ التَّيَمُّنُ فِي تَنَعُّلِهِ وَتَرَجُّلِهِ وَطُهُورِهِ وَفِي شَأْنِهِ كُلِّهِ.
Narrated `Aisha: The Prophet (ﷺ) used to like to start from the right side on wearing shoes, combing his hair and cleaning or washing himself and on doing anything else.
Reference : Sahih al-Bukhari 168In-book reference : Book 4, Hadith 34USC-MSA web (English) reference : Vol. 1, Book 4, Hadith 169