Abu Bakr al-Bazzar: Trustworthy
Abu Hatim al-Razi: Trustworthy, Pious, Follower of the Sunnah
Abu Hatim ibn Hibban al-Busti: He was a حافظ (memorizer) and pious
Abu Zar'ah al-Razi: Trustworthy, except that he heard from Abu Ishaq after the discord
Ahmad ibn Hanbal: From the standard of truthfulness, once: in what he narrated from the Shaykhs, very sound, in his narration from Abu Ishaq, lenient, he heard from him towards his end
Ahmad ibn Shu'ayb al-Nasā'ī: Trustworthy, Upright
Ahmad ibn Sālih al-Jilī: Trustworthy, Upright, Reliable, Follower of the Sunnah and Obedience
Ibn Hajar al-'Asqalānī: Trustworthy, Upright, except that his hearing from Abu Ishaq was towards his end
Ibn Manjūyah al-Isbahānī: Memorizer, Accurate
Al-Dhahabi: Trustworthy, Authority
Sufyan ibn 'Uyaynah: There is none like him in Kufa
Shu'ayb ibn Harb al-Baghdādī: He was more memorizing than twenty like Shu'bah
Muhammad ibn Sa'd كاتب الواقدي: Trustworthy, Upright, Reliable, Abundant in narration
Mu'adh ibn Mu'adh al-'Anbarī: By Allah, Sufyan was never more firm than Zuhayr
Yahya ibn Mu'in: Trustworthy