Buddhism - Hurt not others in ways that you yourself would find hurtful. --Udana-Varga 5, 1
Christianity - All things whatsoever ye would that men should do to you, do ye so to them; for this is the law and the prophets. -- Matthew 7:1 (not my favorite translation)
Don't pick on people, jump on their failures, criticize their faults-- unless, of course, you want the same treatment. -- Matthew 7:1 (better translation)
Confucianism - Do not do to others what you would not like yourself. Then there will be no resentment against you, either in the family or in the state. --Analects 12:2
Hinduism - This is the sum of duty; do naught onto others what you would not have them do unto you. --Mahabharata 5,1517
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 fellowman. This is the entire Law; all the rest is commentary. --Talmud, Shabbat 3id
Taoism - Regard your neighbor's gain as your gain, and your neighbor's loss as your own loss. --Tai Shang Kan Yin P'ien
Wicca - An' ye harm none, do what ye will. --The Wiccan Rede
Zoroastrianism - That nature alone is good which refrains from doing another whatsoever is not good for itself. --Dadisten-I-dinik, 94,5
NOW, if we could all just follow the basic tenets of our chosen spiritual path our world would be such a better place!