Narrated Abu Huraira (RadhiAllahu ‘anhu):
The Prophet (salAllahu alayhi wa sallam) said:
“The young should greet the old, the passer by should greet the sitting one, and the small group of persons should greet the large group of persons.”
[Sahih Bukhari – Book #74 – Hadith #250]
Please Share this Hadith with your relatives & friends and may Allah SWT reward you.