Muslims believe the location of the Dome of the Rock to be the site mentioned in Sura 17 of the Qur'an, which tells the story of the Isra and Mi'raj, the miraculous Night Journey of Prophet Muhammad from Mecca to "the farthest mosque", where he leads prayers and rises to heaven to receive instructions from Allah. The Night Journey is mentioned in the Qur'an in a very brief form and is further elaborated by the hadiths. Caliph Umar ibn Al-Khattab (579–644) was advised by Ka'ab al-Ahbar, a Jewish rabbi who converted to Islam, that "the farthest mosque" is identical with the site of the former Jewish Temples in Jerusalem.