Abu Ja'far al-Tahawi: He was of sound mind
Abu Hatim al-Razi: He considered him trustworthy and praised him highly
Abu Hatim ibn Hibban al-Busti: He mentioned him among the trustworthy
Abu Zur'a al-Razi: He narrated from him
Ahmad ibn Shu'ayb al-Nasa'i: Thiqah
Ibn Hajar al-'Asqalani: Thiqah
Al-Dhahabi: One of the Imams, trustworthy, jurist, hadith scholar, reciter, one of the wise and noble
Ali ibn al-Hasan ibn Qutayba: He used to memorize hadith
Muhammad ibn Idris al-Shafi'i: No one enters through the door of the mosque more intelligent than him
Muslim ibn al-Qasim al-Andalusi: Hafiz (One who memorized a large amount of hadith)
Yahya ibn Hassan al-Tunisi: One of the pillars of Islam