Hundreds of worshippers line the full length of a residential street in Ain Shams, Cairo, performing the Eid al-Adha (العيد الأضحى) outdoor congregation prayer in organized rows. Eid al-Adha is one of the two major Islamic holidays, commemorating the willingness of Ibrahim (Abraham) to sacrifice his son as an act of obedience to God, and is marked by communal prayer, sacrifice, and charity. Street prayers of this scale are a common and distinctly Egyptian tradition, reflecting the high attendance that often exceeds mosque capacity during the two Eid celebrations.