The Book on Salutations and Greetings (Kitab As-Salam)

Muslim :: Book 26 : Hadith 5374

Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The rider should first greet the pedestrian, and the pedestrian the one who is seated and a small group should greet a larger group (with as-Salam-u-'Alaikum).