Shortly after his return to Medina, Muhammad suffered from terrible headaches for a month; he asked Abu Bakr to preach in his place when he was bedridden. The Prophet dies on June 8, 632; he was 63 years old. Aicha was apprehensive that her father might succeed to the Prophet with the subsequent responsibilities, and asked Omar to preach instead, since he had a loud voice and a large body. Muhammad got irate for Aicha involvement in altering his decision, and demanded that Abu Baker resume the preaching. Omar would not believe that the Prophet could die and threatened anyone who says so...