Abu Bakr al-Bayhaqi: Imam and Hadith Scholar
Abu Bakr ibn Ishaq al-Subghi: I have not seen among the narrators of Hadith anyone more respected than him
Abu Abdullah al-Hakim al-Naysaburi: The Imam of his time in Nishapur in the knowledge of Hadith and narrators
Abu Ali al-Hafiz al-Naysaburi: My eyes have not seen anyone like him
Al-Dhahabi: The Imam, the Hadith Scholar, the Imam of Hadith narrators of his time
Abdullah ibn Sa'd al-Naysaburi: I have not seen anyone like him, nor has he seen anyone like himself
Muhammad ibn Ya'qub al-Akhram: Our city only produced three: Muhammad ibn Yahya and Muslim, and Ibrahim ibn Abi Talib