Aisha reported: The Prophet, peace and blessings be upon him, liked to begin on his right side when putting on his shoes, combing his hair, performing his ablution, and in all of his affairs.
Source: Ṣaḥīḥ al-Bukhārī 168, Ṣaḥīḥ Muslim 268
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ عَائِشَةَ قَالَتْ كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُعْجِبُهُ التَّيَمُّنُ فِي تَنَعُّلِهِ وَتَرَجُّلِهِ وَطُهُورِهِ وَفِي شَأْنِهِ كُلِّهِ
168 صحيح البخاري كتاب الوضوء باب التيمن في الوضوء والغسل
268 صحيح مسلم كتاب الطهارة باب التيمن في الطهور وغيره