The Isra and Mi’raj (Arabic: الإسراء والمعراج‎, al-’Isrā’ wal-Mi‘rāj) are the two parts of a Night Journey that, according to Islam, Muhammad took during a single night around the year 621 CE. It has been described as both a physical and spiritual journey. A brief sketch of the story is in surah al-Isra of the Quran, and other details come from the hadith, which are collections of the reports, teachings, deeds and sayings of Muhammad. In the Isra’, Muhammad traveled on the steed Buraq to “the farthest mosque”. Traditionally, later Muslims identified the mosque as a location in the physical world, the Al-Aqsa Mosque in Jerusalem. At the mosque, Muhammad led other prophets in prayer. He then ascended to the heavens in the Mi‘raj. The remembrance of this journey is one of the most significant events in the Islamic calendar.