Banu Qurayza
There were three main Jewish tribes in Medina, forming the most important Hejazi community before the rise of Islam in Arabia. These were the Banu Nadir, the Banu Qainuqa and the Banu Qurayza. Banu Nadir, the Banu Qainuqa, and the Banu Qurayza lived in northern Arabia, at the oasis of Yathribu until the 7th century, when the men were sentenced to death and women and children enslaved after betraying the pact made with the Muslims following the Invasion of Banu Qurayza by Muslim forces under Muhammad.