"One should never do that to another which one regards as injurious to one's own self. "
-- Brihaspati, Mahabharata (Anusasana Parva, Section CXIII, Verse 8) [Hindu Teaching ~3200 BC]

"That which is hateful to you, do not do to your fellow. "
-- Talmud, Shabbat 31a, the "Great Principle"

"Never impose on others what you would not choose for yourself. "
-- Confucius ~500 BC Chinese Philospher (Analects XV.24)

"Do unto others as you would have them do unto you. "
-- Jesus ~30 AD [Luke 6:31]