A number of verses are associated with particular events which helps date them. Muhammad's first revelation was chapter 96 (year 609). Verses 16:41 and 47:13 refer to migration of Muslims which took place in the year 622. Verses 8:1–7 and 3:120–175 refer to battles of Badr (624) and Uhud (625) respectively. Muhammad's last pilgrimage is mentioned in 5:3 which occurred in 632, a few months before he died. This method is of limited usefulness because the Quran narrates the life of Muhammad or the early history of the Muslim community only incidentally and not in detail. In fact, very few chapters contain clear references to events which took place in Muhammad's life.