Muslim Pilgrims at Masjid al-Nabawi

MEDINA, SAUDI ARABIA - AUGUST 25: General view of Masjid al-Nabawi, the mosque where hosts Holy Prophet Muhammad's tomb on the fourth day of Eid Al-Adha (Feast of Sacrifice), during Muslim pilgrims' visit after they completed the hajj pilgrimage in Medina, Saudi Arabia on August 25, 2018. Muslims worldwide celebrate Eid Al-Adha, to commemorate the holy Prophet Ibrahim’'s (Prophet Abraham) readiness to sacrifice his son as a sign of his obedience to God, during which they sacrifice permissible animals, generally goats, sheep, and cows. Eid-al Adha is the one of two most important holidays in the Islamic calendar, with prayers and the ritual sacrifice of animals. (Photo by Mustafa Ciftci/Anadolu Agency/Getty Images)