Less than two years after the truce of Hudaybiyyah, the truce was broken by a squabble between tribes allied to the Meccans and Medinans. There had long been bad blood between the Khuza'ah and the Banu Bakr bin Abd Manat, and the two groups lined up on opposite sides, the Khuza'ah with the Muslims and the Banu Bakr with the Meccans . Watt (p. 62) says that some of the Quraysh helped the Banu Bakr ambush the Khuza'ah.