Muslims consider the Quran to be a holy book, the word of God, and a miracle. One feature of the book believed to be miraculous is the expressiveness of its verses, as it is claimed they are too eloquent to be written by a human. Another is the amount of scientific information believed to be in the Quran that was not known in the 7th century when the Quran was revealed, which is said to prove that the Quran's origin must be divine. Several verses in the Qur'an are believed to describe miracles -- the splitting of the moon, and assistance of angels given to Muslims at the Battle of Badr.