"Do not do to others what you would not like yourself. Then there will be no resentment against you, either in the family or in the state."
Confucius [K'ung Fu Tse] (551-479 BC), Analects 12:2
"Tsze-kung said, What I do not wish men to do to me, I also wish not to do to men. The Master said, Tsze, you have not attained to that."
Confucius (551-479 BC), Analects 5:12
"Tzu-kung asked, Is there a single word which can be a guide to conduct throughout one's life? The Master said, It is perhaps the word shu [reciprocity]. What you don't want yourself, don't do to others."