Jund Filastin
Early Muslim historian al-Biladhuri mentions Bayt Jibrin (the name given to it by the Arabs following the Muslim conquest) as one of ten towns in Jund Filastin (military district of Palestine) conquered by the Muslim Rashidun army under 'Amr ibn al-'As's leadership during the 630s. Al-Biladhuri also wrote that al-'As enclosed a domain to Bayt Jibrin, which he named 'Ajlan, after one of his freemen.