Ahmad ibn Salih al-Jalil: Trustworthy, righteous man
Ibn Hajar al-'Asqalani: Trustworthy, eminent, and retentive
Ibn Zubar al-Rabi'i: He narrated from him, and quoted 'Abd al-Rahman ibn Marzuq as saying: I have not written from anyone better than him
Al-Dhahabi: I have not seen anyone more retentive than him
Al-Mundhir ibn Shadhan: I have not seen anyone more retentive than him
'Abd al-Rahman ibn Yusuf ibn Kharash: Trustworthy, eminent, and pious
Muhammad ibn Sa'd, the scribe of al-Waqidi: Righteous, trustworthy, and truthful
Yahya ibn Ma'in: He is alright