Banu Qaynuqa
The Banu Qaynuqa (also spelled Banu Kainuka, Banu Kaynuka, Banu Qainuqa, Banu Qaynuqa, Arabic: بنو قينقاع) was one of the three main Jewish tribes living in the 7th century of Medina, now in Saudi Arabia. In 624,
the great-grandfather of Banu Qaynuqa tribe is Qaynuqa ibn Amchel ibn Munshi ibn Yohanan ibn Benjamin ibn Saron ibn Naphtali ibn Hayy ibn Moses and they are descendant of Manasseh ibn Joseph ibn Jacob ibn Isaac son of Abraham
they were expelled during the Invasion of Banu Qaynuqa, by the Islamic prophet Muhammad for breaking the treaty known as the Constitution of Medina.
Arrival of Muhammad
In September 622, Muhammad arrived at Yathrab now called as Medina with a group of his followers, who were given shelter by members of all indigenous tribes od the city who came to be known as the Ansar. He proceeded to set about the establishment of a pact, known as the Constitution of Medina, between the Muslims, the Ansar, and the various Jewish tribes of Yathrab to regulate the matters of governance of the city, as well as the extent and nature of inter-community relations. Conditions of the pact, according to traditional Muslim sources, included boycotting the Quraysh, abstinence from "extending any support to them", assistance of one another if attacked by a third party, as well as "defending Medina, in case of a foreign attack".