Abu Sa'd al-Sam'ani: He was the Mizki of his time, and the foremost in asceticism and piety
Abu 'Abd Allah al-Hakim al-Naysaburi: He was the Mufti of his time, and the foremost in asceticism and piety
Ibrahim ibn Abi Talib al-Naysaburi: A righteous man
Al-Dhahabi: Trustworthy, protected, ascetic, worshiper, pious, intelligent