Similarly, there came not to those before them any messenger except that they said, "A magician or a madman." Did they suggest it to them? Rather, they [themselves] are a transgressing people.

     Similarly, there came not to those before them any messenger except that they said, "A magician or a madman." Did they suggest it to them? Rather, they [themselves] are a transgressing people. So leave them, [O Muhammad], for you are not to be blamed. 

THE QUR'AN, adh-Dhariyat 51:52-54