(146) باب مَنْ أَوْلَى بِالسَّلاَمِ
Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying :
The young should salute the old, the one who is passing by should salute the one who is sitting, and a small company should salute a large one.
Reference: Sunan Abi Dawud 5198
In-book reference: Book 43, Hadith 426
English translation: Book 42, Hadith 5179