Asma' bint Yazid reported that the Prophet, may Allah bless him
and grant him peace, said, "Shall I tell you who is the best of you?" "Yes,,"
they replied. He said, "Those who remind you of Allah when you see them."
He went on to say, "Shall I tell you who is the worst of you?" "Yes," they
replied. He said, "Those who go about slandering, causing mischief between
friends in order to separate them, and desiring to lead the innocent into
wrong action."