Ubayda ibn as-Samit

'Ubadah ibn al-Samit was a companion of Muhammad and a well-respected chieftain of the Ansar. He participated in almost every battle during Muhammad's era. His official title, according to Muslim scholarly tradition, was 'Ubadah ibn Saamit al-Ansari al-Badri for his actions at the Battle of Badr. He served under the first three Rashidun caliphs in the Muslim campaigns against the Byzantine Empire.