Muslims 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 January 16, 2016. Muslims believe Prophet Mohammad received the first words of the Koran through Gabriel, at the top of Mount Al-Noor in the holy city of Mecca. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims climb towards the Hira cave at the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims take a selfie at the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims take a picture at the Hera cave in Mount Al-Noor during their Umrah “Mawlid al-Nabawi” or “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslim pray at the Hera cave in Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia, January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Buildings are seen from the top of Mount Al-Noor in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





A cat looks on top of Mount Al-Noor in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Clouds are seen at the top of Mount Al-Noor in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims pray at the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims pray at the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





A boy climbs up to the top of Mount Al-Noor during the Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





A Muslim woman makes her way out of the Hera cave on Mount Al-Noor during her Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





The Grand Mosque (bottom) and the Abraj Al Bait Towers (L) are seen from the top of Mount Al-Noor in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





A Muslim woman prays at the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)





Muslims descend the top of Mount Al-Noor during their Umrah Mawlid al-Nabawi “Birthday of Prophet Mohammad” in the holy city of Mecca, Saudi Arabia January 16, 2016. (Photo by Amr Abdallah Dalsh/Reuters)