Qamus e dzayer jazayriya fran ais
Qamus was one of the fortresses of the Jewish poet Al-Rabi ibn Abu al-Huqayq, and his Jewish tribe called Banu Qurayza. The fortress was situated near Khaybar in what is now Saudi Arabia. The fortress was attacked by Muslim forces and defeated. It was after this event that Muhammad married Safiyyah bint Huyayy.
References
Qamus Wikipedia(Text) CC BY-SA