I say: Bundār used to boast that those men had transmitted ḥadīth from him.

Ishāq ibn Aḥmad ibn Zabarak related from Abū Ḥātim al-Rāzī, who said, “The most knowledgeable person ever to set foot in Iraq is Muḥammad ibn Ismāʿīl; the most knowledgeable man in Khurāsān today is Muḥammad ibn Yaḥyā; the most scrupulous of them is Muḥammad ibn Aslam; and the most reliable of them is ʿAbd Allāh ibn ʿAbd al-Raḥmān.”

ʿAbd al-Raḥmān ibn Abī Ḥātim transmitted from his father, who said, “ʿAbd Allāh ibn ʿAbd al-Raḥmān is the imām of the people of his era.” (1)

Abū Ḥāmid ibn al-Sharqī said, “Khurāsān has produced only five imāms of ḥadīth: Muḥammad ibn Yaḥyā, Muḥammad ibn Ismāʿīl, ʿAbd Allāh ibn ʿAbd al-Raḥmān, Muslim ibn al-Ḥajjāj, and Ibrāhīm ibn Abī Ṭālib.”

Muḥammad ibn Ibrāhīm ibn Manṣūr al-Shīrāzī remarked, “ʿAbd Allāh reached the pinnacle of intellect and piety; he was a by-word for forbearance, insight, retention, worship, and asceticism. He made the science of ḥadīth and early reports thrive in Samarqand, shielded it from falsehood, and was a consummate Qur’an exegete and a learned jurist.”

Abū Ḥātim ibn Ḥibbān said, “Al-Dārimī was one of the precise masters of memorization, a man of religious scrupulousness who preserved, compiled, studied, authored, and transmitted. He established the Sunnah in his land, called people to it, defended its sanctity, and suppressed anyone who opposed it.”

Abū Bakr al-Khaṭīb declared, “He was one of the itinerant scholars of ḥadīth, renowned for his memorization, collection, and mastery of it, combined with trustworthiness, truthfulness, and piety.”