ON THE SUBJECT OF 133 THE GREETING OF TWO PEOPLE TO ONE ANOTHER; ETIQUETE OF GREETING H 869 "A rider should greet a pedestrian. A pedestrian should greet one who is sitting and a small party should greet a large party. Younger people should greet their elders first." R 869 Bukhari and Muslim with a chain up to Abu Hurairah who related that the Prophet, praise and peace be upon him, said this.
باب آداب السلام 857- عن أَبي هريرة رضي الله عنه : أنَّ رسول الله صلى الله عليه وآله وسلم ، قَالَ : "يُسَلِّمُ الرَّاكِبُ عَلَى المَاشِي ، وَالمَاشِي عَلَى القَاعِدِ ، وَالقَليلُ عَلَى الكَثِيرِ" متفقٌ عَلَيْهِ . وفي رواية للبخاري : "والصغيرُ عَلَى الكَبيرِ" .