After the casting of stones, animals are slaughtered to commemorate the story of Abraham and Ishmael. Traditionally the pilgrims slaughtered the animal themselves, or oversaw the slaughtering. Today many pilgrims buy a sacrifice voucher in Mecca before the greater Hajj begins, which allows an animal to be slaughtered in the name of God (Allah) on the 10th, without the pilgrim being physically present. Modern abattoirs complete the processing of the meat, which is then sent as charity to poor people around the world.   At the same time as the sacrifices occur at Mecca, Muslims worldwide perform similar sacrifices, in a three-day global festival called Eid al-Adha .