Christianity: Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law of the prophets.

Matthew, 7:12

Judaism: What is hateful to you, do not to your fellowmen. That is the entire Law; all the rest is commentary.

Talmud, Shabbat, 31a

Brahmanism: This is the sum of duty; do naught unto others which would cause you pain if done to you.

Mahabharata, 5, 1517

Buddhism: Hurt not others in ways that you yourself would find hurtful.

Udana-Varga, 5, 18

Confucianism: Surely it is the maxim of loving-kindness: Do not unto others that you would not have them do unto you.

Analects, 15, 23

Taoism: Regard you neighbor's gain as your own gain and your neighbor's loss as your own loss.

T'ai Shang Kan Ying P'ien

Zoroastrianism: That nature alone is good which refrains from doing unto another whatsoever is not good for itself.

Dadistan-i-dinik, 94, 5

Islam: No one of you is a believer until he desires for his brother that which he desires for himself.