"In the midst of a discourse, speak not." ~~ Apocrypha: Ben Sira
"If a guest enters your home, ask him no quesitons of the Torah unless you know that he can answer! " ~~ Sefer Chassidim
"A man should not drink from a glass and then give it to another." ~~ Derekh Eretz R.
"Good manners mean more than learning." ~~ Tanna Deve Eliyahu R.
"Your elder brother should be respected like your father." ~~ Yemenite Proverb
"It is follly to listen at the door, and the clever man regards this as a very shameful thing." ~~ Ben Sira 21:24
"All men should rise when a sage passes." ~~ Talmud, Kiddushin 33a
"Be first in greeting every man!" ~~ Avot 4:15
"Never enter a neighbor’s house unwarned." ~~ Derekh Eretz R.
"Shame not the old: we shall all be numbered among them." ~~ Ben Sira 8:6
"Do not interrupt while another speaks." ~~ Simeon b. Yohai
"Be not boastful in your speech! " ~~ Ben Sira 4:32