Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah
Narrated Abu Huraira (Radi-Allahu ‘anhu): Allah’s Apostle (Sallallahu ‘Alaihi Wa Sallam) said, “The riding one should greet the walking one, and the walking one should greet the sitting one, and the small number of persons should greet the large number of persons.”
Bukhari Vol. 8 : No. 251