Eid al-Adha, "The Feast of Sacrifice," commemorates Abraham's obedience to God's command in his willingness to sacrifice his son. The sacrifice of a sheep is central to the holiday given God's last-minute intervention, offering Abraham an animal instead. Four days before the slaughter of the sheep, it's forbidden to shave or cut one's nails, followed by a one-day fast. They break the fast with a meat-based feast, part of the feast is offered to the poor as part of the holiday's celebration. Muslims in Jerusalem celebrated Eid al-Adha on Tuesday.