Ridda wars
During the Ridda wars, which broke out in Arabia after the death of Muhammad, Abu Bakr sent his most talented general Khalid ibn Walid into Najd with 4000 men to submit the tribes of the surrounding areas. Malik was guilty for his acts against the state of Medina. After the death of Muhammad, he broke in open revolt against Medina. As soon as Malik heard of the death of Muhammad, he gave back all the tax to his tribesmen, saying that