Abu Bakr Al-Bayhaqi: Trustworthy
Abu Hatim Al-Razi: Truthful
Abu Dawud Al-Sijistani: He used to memorize about a thousand hadiths, from the best of his hadiths
Abu Abd Allah Al-Hakim Al-Naysaburi: Authoritative
Abu Nu'aym Al-Asbahani: One of the prominent trustworthy narrators
Abu Ya'la Al-Khalili: Agreed upon his asceticism, knowledge, religiosity and piety, and once mentioned him in Al-Irshad, and said: Trustworthy Imam
Ahmad Ibn Salih Al-Jili: Trustworthy, narrated many hadiths, and he had knowledge of jurisprudence
Ibn Hajar Al-Asqalani: Trustworthy, Firm
Al-Dhahabi: The Hafez (memorizer)
Umar Ibn Shabbah Al-Numayri: By Allah, I have not seen anyone like him
Muhammad Ibn Sa'd Kathib Al-Waqidi: Trustworthy, Jurist
Yahya Ibn Ma'in: Trustworthy, and once said: Weak in Sufyan