Abdullah ibn Mubarak was an early, pious Muslim known for his memory and zeal for knowledge, collected hadīth (muhaddith), and was remembered for his asceticism.He earned the title Amir al-Mu'minin fi al-Hadith. His father, named Mubarak, was from Khurasan and became a client (mawālī) of an Arab trader from the tribe of Banī Hanẓala in the city of Hamadhān, and his mother was said to have been from Khwārizm. Mubarak later married Hind, the trader's daughter. It is said that ‘Abdullah ibn Mubarak left his hometown of Merv, and while living in Hamadhān, went on to visit and speak often in Baghdād. Imam Ahmad said about Abdullah ibn Mubarak that there was no one more eager to travel for seeking knowledge than him. His teachers included Sufyān al-Thawrī and Abū Hanīfa.