He heard from: Abu Muslim al-Kajjee, Muhammad bin Yahyaa al-Marwazee, Abu Shu`ayb al-Harraanee, Ahamd bin Yahya al-Halwaanee, al-Hasan bin Alee bin Alwee al-Qattaan, Ja`far bin Muhammad al-Firyaabee, Musaa bin Haaroon, Khalf bin Amr al-Ukbaree, Abdullaah bin Naahiyah, Muhammad bin Saalih al-Ukbaree, Ja`far bin Ahmad bin Aasim ad-Dimishkee, Abdullaah bin al-Abbaas at-Tayaalisee, Haamid bin Shu`ayb al-Balkhee, Ahmad bin Sahl al-Usnaanee al-Muqri, Ahmad bin Musaa bin Zanjaway al-Qattaan, Eesaa bin Sulaymaan, Abu Alee al-Hasan bin al-Hubaab al-Muqri, Abu al-Qaasim al-Baghawee, ibn Abee Dawood and others.
Those who narrated from him were: Abdur-Rahmaan bin Umar bin Nahaas, Abu al-Husain bin Bishraan, his brother Abu al-Qaasim bin Bishraan, al-Muqri` Abu al-Hasan al-Hamaamee, Abu Nu`aym al-Haafidh and many from amongst the pilgrims and others.
Al-Khateeb said about him, "he was a person possessing deen, trustworthy and precise. He authored (some) works."[Ibn Katheer, ‘al-Bidaayah wa an-Nihaayah’ (11/306); adh-Dhahabee, ‘Siyar’ (16/134-136)]
Ibn al-Atheer described him as being a Haafidh. [Ibn Atheer, ‘al-Kaamil fee at-Taareek’ (7/44)] as did al-Haafidh adh-Dhahabee. [‘Mukhtasar al-Uluw’ (pg. 246)]
Ibn Khalkaan said, "the Shaafi`ee faqeeh, the Muhaddith, author of the famous book ‘al-Arba`een’, he was a righteous servant." [Ibn Khalkaan, ‘Wafayaatul A`yaan’ (4/292), others such as ibn al-Jawzee mentioned him amongst the Hanbalees.]
Ibn al-Jawzee said about him, "he was trustworthy and precise, possessing deen, a scholar and author." [‘Sifatus Safwa’ (2/479)] "He gathered together knowledge and ascetism." [‘Manaaqib al-Imaam Ahmad’ (pg. 515)]
As-Suyutee said, "the Imaam, the Muhaddith, the Example…. He was a scholar enacting what he taught, the follower of the Sunnah, possessing deen, trustworthy and precise." [‘Tabaqaatul Huffaadh’ (pg. 379)]
The work he wrote on Aqeedah was ‘ash-Sharee`ah’ published in one volume with the tahqeeq of Muhammad Haamid al-Fiqqee and in six volumes with the tahqeeq of Dr. Abdullaah bin Umar bin Sulaymaan ad-Dameejee. May Allaah have mercy upon him.