Abdullah ibn Ubayy, chief of the Awf clan and unofficially chief of the Khazraj tribe, lost status in Medina after the Battle of Uhud in 625. Sa'd ibn Ubadah then came to be regarded as the most important Khazraj chief. After the death of Sa'd ibn Mu'adh, the Aws chief, in May 627, Sa'd ibn Ubadah was recognised as the leader of all the "Ansar".