The Israʾ and Miʿraj (Arabic: الإسراء والمعراج‎, al-’Isrā’ wal-Miʿrāj) are the two parts of a Night Journey that, according to Islam, the Islamic prophet Muhammad took during a single night around the year 621. Within Islam it signifies both a physical and spiritual journey. The Quran surah al-Isra contains an outline account, while greater detail is found in the hadith collections of the reports, teachings, deeds and sayings of Muhammad. In the accounts of the Israʾ, Muhammad is said to have traveled on the back of a winged mule-like white beast, called Buraq, to "the farthest mosque". By tradition this mosque, which came to represent the physical world, was identified as the Al-Aqsa Mosque in Jerusalem. At the mosque, Muhammad is said to have led the other prophets in prayer. His subsequent ascent into the heavens came to be known as the Miʿraj. Muhammad's journey and ascent is marked as one of the most celebrated dates in the Islamic calendar