Mount Al-Noor

A Muslim pilgrim sits on the top of Mount Al-Noor, where Muslims believe Prophet Mohammad received the first words of the Koran through Gabriel in the Hera cave, ahead of the annual haj pilgrimage in the holy city of Mecca, Saudi Arabia September 7, 2016. REUTERS/Ahmed Jadallah

Ahmed Jadallah/Reuters

A Muslim pilgrim sits on the top of Mount Al-Noor, where Muslims believe Prophet Mohammad received the first words of the Koran through Gabriel in the Hera cave, ahead of the annual haj pilgrimage in the holy city of Mecca, Saudi Arabia

Muslim pray as they visit the Hira cave at the Mount Al-Noor during their Umrah Mawlid al-Nabawi in the holy city of Mecca, Saudi Arabia

Amr Abdallah Dalsh  © ters

Muslim pray as they visit the Hira cave at the Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia.

A Muslim pilgrim prays at Mount Al-Noor ahead of the annual haj pilgrimage in Mecca October 10, 2013. Mount Al-Noor houses Ghar-E-Hira or Hira cave, where Prophet Mohammad is said to have spent a great deal of time in the cave meditating and it is believed that he had received his first revelation inside this cave.

Ibraheem Abu Mustafa/Reuters

A Muslim pilgrim prays at Mount al-Noor ahead of the annual Hajj pilgrimage to Mecca on Thursday