The strict|the one who is on the Messenger of the Messenger

The strict, the one who is on the authority of the Messenger, a book by Ibn Taymiyyah, about who insulted the Messenger and the rule of insulting the Messenger ﷺ, after the incident of Assaf Al -Nasrani in the year 693 AH/1294AD. The second is that it must be killed, even if it is dhimm, and it is not permissible for it or its hostility. The third is in the ruling of insulting the Messenger if he repents. The fourth in the statement of insulting and the difference between it and disbelief.