Banu Nadir were a Jewish tribe who lived in northern Arabia until the 7th century,
A number of Jews who had formed a party against Muhammad, including Sallam b. Abu'l-Huqayq, Kinana b. al-Rabi and Huyayy b. Akhtab, the chiefs of Nadir who had gone to Khaybar, together with two chiefs from the tribe of B. Wa'ili went to Quraysh (paganists) and invited them to form a coalition against Muhammad so that they might get rid of him altogether. Then they persuaded the tribe of Ghaftan to join the battle against Muhammad
Banu Nadir promised half the date harvest of Khaybar to nomadic tribes if they would join the battle against Muslims.[24][25] Abu Sufyan, the military leader of Quraysh, with the financial help of Banu Nadir had mustered a force of size 10,000 men. Muhammad was able to prepare a force of about 3000 men. He had however adopted a new form of defense, unknown in Arabia at that time: Muslims had dug a trench wherever Medina lay open to cavalry attack. The idea is credited to a Persian convert to Islam, Salman the Persian. The siege of Medina began on March 31, 627 and lasted for two weeks.[26] Abu Sufyan's troops were unprepared for the fortifications they were confronted with, and after an ineffectual siege lasting several weeks, the coalition decided to go home.
In 628, Muhammad attacked Khaybar. According to William Montgomery Watt, this was motivated by the presence of the Banu Nadir in Khaybar, who were inciting hostilities along with neighboring Arab tribes against Muhammad
, you are a liar of a worst kind!
