Ahmad ibn Sadiq al-Baghdadi: I do not know anyone who was more eloquent in defending the religion of God than him
Ishaq ibn Dawud: I do not know anyone more upright in the matters of Islam than Abu Bakr al-Marwazi
al-Khatib al-Baghdadi: He is considered among the companions of Ahmad due to his knowledge and virtue, and he narrated sound hadiths from him
Abd al-Wahhab ibn Abd al-Hakam al-Nasa'i: Trustworthy, Truthful