From Sahih Bukhari (Hadith 5380):
Narrated `Aisha:The Prophet (ﷺ) used to love to start doing things from the right side whenever possible, in performing ablution, putting on his shoes, and combing his hair. (Al-Ash'ath said: The Prophet (ﷺ) used to do so in all his affairs
Reference: Bukhari 5380