Abu Hatim al-Razi: Weak, and once: Truthful
Abu Hatim ibn Hibban al-Busti: He may have disagreed
Abu Dawud al-Sijistani: He was not like that
Ahmad ibn Hanbal: I hope that he did not narrate except with truth
Ahmad ibn Shuayb al-Nasa'i: Not trustworthy
Ibn Hajar al-Asqalani: Weak despite his Imamate and knowledge because he used to prompt Hajjaj ibn Muhammad, his sheikh
Al-Khatib al-Baghdadi: He has knowledge of hadith and accuracy, and the senior scholars narrated from him and cited him as evidence
Authors of Tahrir Taqrib al-Tahdhib: Weak despite his Imamate and knowledge because he used to prompt Hajjaj ibn Muhammad, his sheikh