Abu al-Fath al-Azdi: Very weak
Abu Bakr al-Bazzar: He was not a Hadith scholar
Abu Hatim al-Razi: His hadiths are acceptable
Abu Hatim ibn Hibban al-Busti: He is among those who make mistakes, but his mistakes are so frequent that it invalidates using him as a reference
Abu Dawud al-Sijistani: He is neither strong nor a Hadith scholar, and once said: He was a Mu'tazilite, with bad opinions, and once: His hadiths are rejected, and he is not trustworthy
Ahmad ibn Hanbal: There is nothing wrong with him, except that he has some hadiths, and once: He does not memorize well and he mentioned things in which he made mistakes
Ibn Hajar al-Asqalani: Lenient, accused of Mu'tazilism
Ali ibn al-Junayd al-Razi: There is something in my heart about his hadiths
Wakee' ibn al-Jarrah: He considered him trustworthy
Yahya ibn Ma'in: His hadiths are acceptable, and once: Weak
Yazid ibn Harun al-Ayli: He was a butcher, a poet, and a Mu'tazilite in our view, and I used to pray with him in the mosque and I never heard anything like that from him