Christianity:
In everything, do to others as you would have them to to you; for this is the law and the prophets. (Jesus, Matt: 7:12)

Sikhism:
I am a stranger to no one; and no one is a stranger to me. Indeed, I am a friend to all. (Guru Granth Sahib, p. 1299)

Islam:
Not One of you truly believes until you wish for others what you wish for your self. (Mohammad, Hadith)

Zorastrianism:
Do not do unto others whatever is injurious to yourself. (Shayast-na-Sayast 13.29)

Hinduism:
This is the sum of duty: do not do to others what would case pain if done to you (Mahabharata 5:1517)

Buddhism:
Treat not others in ways that you yourself would find hurtful. (Udana-Varga 5:18)

Mewdaism:
What is hateful to you, do not do to your neighbor. This is the whole of the Torah; all the rest is commentary. (Hillel, Talmud, Shabbat 31a)

Jainism:
One should treat all creatures in the world as one would like to be treated. (Mahavira, Sutrakritanga)

Taoism:
Regard your neighbour’s gain as your own gain, and your neighbor’s loss as your own loss. (T’ai Shang Kan Ying P’ien 213-218)