Ibn Rajab al -Hanbali, through his book, which was entitled to the provisions of the difference in the vision of the crescent of Dhu al -Hijjah, told a jurisprudential incident that occurred in his time, and that he is the cloud of the crescent of Dhu al -Hijjah in the aforementioned year, so people completed the month of Dhu al -Qi'dah, then the people spoke to see the crescent of Dhu al -Hijjah....