Muslim historians started with recording Sirah (the biography of the holy Prophet), that is, everything related to the prophet, in the form of hadith. Therefore, the knowledge of the tradition and the hadith are tied together. It is obvious that the origin of this scientific movement was the city of Medina, which housed many events at the beginning of Islam and was the center of gathering of many Muslims. Therefore, awareness of the events of that period became very important for Muslims and attracted the attention of all groups and personalities. In the meantime, the Companions of the Messenger of God, who were present and observed the events of the Prophet's era, were the first group and authority that were considered as the source of information related to this period. But it was obvious that all of them were not in the same rank and some of them were superior in this field. However, the political, social, and intellectual issues of the Muslim community were also effective in transferring this knowledge to the next generation, and the news of the Prophet's era faced complications.