The Golden Rule:

Bahá'í Faith
Lay not on any soul a load that you would not wish to be laid upon you, and desire not for anyone the things you would not desire for yourself. (Bahá’u’lláh.Gleanings, LXVI:8)

Treat not others in ways that you yourself would find hurtful.
(Buddha, Udana-Varga 5.18)

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

One word which sums up the basis of all good conduct. . .loving kindness. Do not do to others what you do not want done to yourself.
(Confucius, Analects 15.23)

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

Not one of you truly believes until you wish for others what you wish for yourself.
(Muhammad, Hadith)

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

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

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, pg. 1299)

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

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