Abu Hatim ibn Hibban al-Busti: He mentioned him in al-Thiqat and said: He was mostly known for his knowledge of literature and poetry
Abu Dawud al-Sijistani: One of the most reliable narrators
Abu 'Abd Allah al-Hakim al-Naysaburi: There is a consensus on his piety
Ibn Hajar al-'Asqalani: Trustworthy narrator, but he was accused of holding Kharijite views
al-Daraqutni: He is fine, he cared about some of the Kharijite views
al-Dhahabi: Trustworthy
al-Qasim ibn Salam al-Harawi: He used to consider him trustworthy and narrate many hadiths from him
Tha'lab the Grammarian: He held Kharijite views
Ali ibn al-Madini: He spoke well of him and authenticated his narrations, and said: He would not narrate anything from the Arabs except what was correct
Muhammad ibn Ahmad ibn al-Azhar: He was accused of fabricating narrations
Yahya ibn Ma'in: There is nothing wrong with him