389. No one should attack a Brâhmana, but no Brâhmana (if attacked) should let himself fly at his aggressor! Woe to him who strikes a Brâhmana, more woe to him who flies at his aggressor!
390. It advantages a Brâhmana not a little if he holds his mind back from the pleasures of life; when all wish to injure has vanished, pain will cease.
DHAMMAPADA, Chapter 26. THE BRÂHMANA (ARHAT).