Against Muhammad
Those who insult the Messenger will face a painful punishment.
9:61And of them are those who vex the Prophet and say: He is only a hearer. Say: A hearer of good for you, who believeth in Allah and is true to the believers, and a mercy for such of you as believe. Those who vex the messenger of Allah, for them there is a painful doom.
33:57Lo! those who malign Allah and His messenger, Allah hath cursed them in the world and the Hereafter, and hath prepared for them the doom of the disdained.