NOUAKCHOTT, MAURITANIA - AUGUST 12: Sacrificial camels were waited to be sold at Marbat Livestock Market after their value increased due to drought and exportation with Senegal and Mali during Eid al-Adha in Nouakchott, Mauritania on August 12, 2019. 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. Ozkan Bilgin / Anadolu Agency/ABACAPRESS.COM