´Narrated Fadalah bin 'Ubaid:` that the Messenger of Allah (ﷺ) said: "The horseman gives Salam to the walking person, the walking person to the one standing and the few to the many."
Hadith Referenceسنن ترمذي / كتاب الاستئذان والآداب عن رسول الله صلى الله عليه وسلم / 2705