In every thing do to others as you would have them do to you; for this is the law and the prohets. Christian (Matthew 7:12)

Hurt not others in ways that you yourself would find hurt ful. Buddhist (LIdama-Varga 5:18) Regard your neighbor's gain as your own gain and your neighbor's loss as your own loss. Taoist (T'ai Shang Kan Ying P'ien) What is hateful to you, do not do to your fellow man.  That is the entire Law; all the rest is commentary. Jewish (Talmud, Shabbat 31a) This is the sum of duty: Do naught unto others which would cause you pain if don to you. Brahman (Mahabharata 5:1517) Surely it is the maxim of loving-kindness: Do not unto others what you would not have done unto you. Confucian (Analects 15:23) That nature alone is good which refrains from doing unto anothe whatsoever is not good of itself. Zoroastrian (Dadistan-i-dinik 94:5) No one of you is a believer until he desires for his brother that which he desires for himself. Islamic (Sunnah)

The Golden Rule

When you hear of the golden rule you think only of the christian rule

However, there are many other popular religions have a simliar saying with the same message.