Su'alat Abi Dawud lil-Imam Ahmad ibn Hanbal fi jarh al-ruwah wa-ta'dilihim - Ibn Hanbal, Ahmad ibn Muhammad, 780-855; al-Azhari, Abu'Umar Muhammad ibn'Ali; Abu Da'ud Sulayman ibn al-Ash'ath al-Sijistani, 817 or 18-889 (al-Qahirah : al-Faruq al-Hadithiyah, 2010)
Keywords: Hadith -- Authorities -- Early works to 1800; Hadith -- Criticism, interpretation, etc. -- Early works to 1800