During the period before the Hijra, Abu Qays al-Aslat of the clan of Wāʼil, the leader of Aws, gave away the leadership to Ḥuḍayr bin Simāk of ʻAbd al-Ashhal. After a serious defeat, ʻAbd al-Ashhal and Ẓafar were withdrawn from Yathrib. The opposing leader, ʻAmr bin Nuʻmān, of the Khazrajite clan of Bayāḍa, drove the Jewish tribes of Banu Qurayza and Banu Nadir into alliance of the two. Nomads of Muzayna joined them too. Most of the Khazraj except ʻAbd Allāh bin Ubayy and another Khazraj leader, as well as the Jewish tribe Banū Qaynuqāʻ and the nomadic Juhayna and Ashjaʻ, supported ‘Amr bin Nu‘mān. The Awsite clan of Ḥāritha remained neutral. Then, in about 617, the Battle of Buʻāth began: the Aws forced back at first but finally defeated their opponents. The leaders of both sides were killed.