The Golden Rule

Hurt not others in ways that you yourself would find hurtful. - Buddhism

What is hateful to you, do not to your fellow man. That is the entire Law; all the rest is commentary. - Judaism

Do unto others as you would have them do unto you. - Christianity

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

Blessed is he who preferreth his brother before himself. - Bahai Faith