The book is a part of the whole series “Kitab At-Tabaqat-Al-Kabir “, a biographical details about the life style of Muslims at the Time of prophet Muhammad (SAA) and about his wives, daughters, companions and afterwards. It also describes the time of Rashidun khalips, the Umayyads, and the ‘Abbasids , history of the Battle of Badr and the other historic events. Muhammad Ibn Sa’d is the author of this whole series. This is the second part of the whole series named ‘The Companions Of Badr’. This series is about history of badr and the condition of Muslims and non believers that time.