Abu al-Rabi' al-Zahrani: I have not seen anyone like him
Abu al-Qasim ibn Bashkwal: Trustworthy
Abu Bakr al-Bayhaqi: Imam, حافظ (Preserver)
Abu Hatim al-Razi: Imam, Trustworthy
Abu Hatim ibn Hibban al-Busti: One of the precise حافظ (Preservers) and the people of piety in religion who memorized, collected, learned Fiqh, authored, narrated, and refused to narrate except from the trustworthy
Abu Ya'la al-Khalili: Imam without any doubt
Ahmad ibn Hanbal: Trustworthy, one of the best examples of truthfulness, righteous Muslim, and once: حافظ (Preserver), and he preferred him over Wakee', and once: If he narrates from a man, then he is a proof
Ibn Hajar al-'Asqalani: Trustworthy, Upright, حافظ (Preserver), Knowledgeable of Narrators and Hadith
Al-Dhahabi: The حافظ (Preserver), Imam, Scholar
Ali ibn al-Madini: The most knowledgeable of people, and the most trustworthy of the companions of Sufyan al-Thawri, and once: I have never seen anyone more knowledgeable of Hadith than him
Muhammad ibn Idris al-Shafi'i: I do not know of anyone like him in the world
Muhammad ibn Sa'd Katb al-Waqidi: Trustworthy, narrated many Hadiths
Yahya ibn Ma'in: One of the most trustworthy Sheikhs of Basra, and in the narration of Ibn Mahriz: He considered him among the trustworthy