Hazrat Abdullah (may Allah be pleased with him) narrates that a man said: O Messenger of Allah! When I do a good deed and when I do a bad deed, how will I know that I have done good or bad? The Prophet (peace and blessings be upon him) said: When you hear your neighbors saying that you have done good, then you have done good; and when you hear them saying that you have done bad, then you have done bad.