Narrated Abu Said Al-Khudri (Radi-Allahu 'anhu):

Narrated Abu Said Al-Khudri (Radi-Allahu 'anhu):

The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "Beware! Avoid sitting on
he roads (ways)." The people said, "There is no way out of it as these are
our sitting places where we have talks." The Prophet (Sallallahu 'Alaihi Wa
Sallam) said, "If you must sit there, then observe the rights of the way."
They asked, "What are the rights of the way?" He said, "They are the
lowering of your gazes (on seeing what is illegal to look at), refraining
from harming people, returning greetings, advocating good and forbidding
evil."

Bukhari Vol. 3 : No. 645