الأوس والخزرج
Eventually the Banu 'Aws and the Banu Khazraj became hostile to each other and by the time of Muhammad's Hijrah (emigration) to Medina in 622 CE, they had been fighting for 120 years and were sworn enemies The Banu Nadir and the Banu Qurayza were allied with the 'Aws, while the Banu Qaynuqa sided with the Khazraj. They fought a total of four wars.