See 993.  

قَالَ رَسُولُ اللهِ ﷺ يُسَلِّمُ الرَّاكِبُ عَلَى الْمَاشِي وَالْمَاشِي عَلَى الْقَاعِدِ وَالْقَلِيلُ عَلَى الْكَثِيرِ  

Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "The young person greets the old person, the person walking greets the person sitting down, and the small group greets the large group."  

قَالَ رَسُولُ اللهِ ﷺ يُسَلِّمُ الصَّغِيرُ عَلَى الْكَبِيرِ وَالْمَاشِي عَلَى الْقَاعِدِ وَالْقَلِيلُ عَلَى الْكَثِيرِ