The Golden Rule

Christianity:
All things whatsoever yo would that men should so to you, do ye even so to them: for this is the Law and the Prophets.
Mathew, 7.12

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

Judaism:
What is hateful to you, do not do to your fellow man. That is the entire Law; All the rest is commentary.
Talmud, Shabbet, 31a

Brahmanism:
This is the sum of duty: Do naught unto others which would cause you pain if done to you.
Mahabarata, 51 1517

Buddhism:
Hurt not others in ways that you yourself would find hurtful
Udan-Varga, 5,18

Confuscianism:
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 your neighbour’s gain as your own gain, and your neighbour’s loss as your own loss.
T’ai Shang Kan Ying Pien

Zoroastrianism:
That nature alone is good which refrains from doing another whatsoever is not good for itself.
Dadistan-i-dinik, 94,5