Abū Ḥātim al-Rāzī said, “He is more proficient in jurisprudence than ʿAbd al-ʿAzīz al-Darāwardī.”

Aḥmad ibn Zuhayr relates: “I heard Yaḥyā ibn Maʿīn say, ‘Ibn Abī Ḥāzim is not reliable in the reports he narrates from his father.’ Such was the statement that has reached us.”

In fact, he is a sound authority both for the hadith of his father and for other narrations.

Aḥmad ibn Ḥanbal said, “During his lifetime there was no one in Medina more learned in jurisprudence than he, and it is held that he heard directly from his father.”

As for the books, they say that the manuscripts of Sulaymān ibn Bilāl passed into his possession.

Aḥmad also remarked on another occasion, “He was not known to pursue hadith except for his father’s books,” and people say, “He heard them directly.”

I say: His narrations are included in the authentic collections.

Ibn Saʿd said: “He was born in the year 107 AH and died while in prostration in 184 AH.”

ʿUmar ibn al-Qawwās informed us; ʿAbd al-Ṣamad ibn al-Ḥarastānī narrated to us in person; ʿAlī ibn al-Musallam informed us; Naṣr ibn Ṭalāb informed us; Ibn Jumayʿ related; al-Ḥusayn ibn Ismāʿīl in Baghdad told us; ʿAbd al-Raḥmān ibn Yūnus narrated to us; ʿAbd al-ʿAzīz ibn Abī Ḥāzim, from his father, from Sahl ibn Saʿd, said: “The Messenger of Allah ﷺ forbade the sale of uncertainty (1)."