Abu Hatim ibn Hibban al-Busti: Mentioned him among the trustworthy
Abu Zar'a al-Razi: Umar ibn al-Khattab said to him: 'Either you stop narrating Hadiths or I will banish you to the land of monkeys'
Ibn Hajar al-Asqalani: Trustworthy
Al-Mizzi: He met the Prophet, peace and blessings be upon him, and embraced Islam during the caliphate of Abu Bakr al-Siddiq
Umar ibn al-Khattab: Warned him, saying: 'Either you stop narrating Hadiths or I will banish you to the land of monkeys'
Muhammad ibn Ismail al-Bukhari: One of the most truthful narrators from among the People of the Book, although we would still test his narrations for falsehood
Authors of Tahrir Taqrib al-Tahdhib: His saying: 'Trustworthy,' requires careful consideration, unless it is based on his principle of authenticating the successors (of the Companions), for no one among the predecessors has reported him to be trustworthy, except that some of the Companions praised his knowledge. He did not narrate in Sahih al-Bukhari or Sahih Muslim, and most of what he narrates are strange and wondrous stories from the Israelites, which are sufficient for us
Mu'awiya ibn Abi Sufyan: One of the most truthful narrators from among the People of the Book, although we would still test his narrations for falsehood