On the east side of Madinah, there was a settlement of the Banu al-Nadir, a Jewish tribe. There was a peace treaty between them and the Prophet Muhammad. But they committed breaches of this treaty time and again. At last in the fourth year of Hijrah, Almighty God created such conditions that they were compelled to leave Madinah. Thereafter, they settled in Khybar and Azra’at. But their conspiratorial activities continued. During the caliphate of ‘Umar Faruq, they and some other Jewish tribes were made to leave the Arabian Peninsula. They subsequently went to Syria and settled there.