Abu Ahmad ibn 'Adi al-Jurjani: I hope that he does not deserve nor warrant a declaration of his lying
Abu Hatim al-Razi: Weak narrator, he narrated fabricated hadiths, and he used to invent hadiths
al-Daraqutni: One of the sheikhs of the Shia
Muhammad ibn Isma'il al-Bukhari: Rejected narrator, his hadiths are not to be written