Ei al-Adha (Arabic: عيد الأضحى ‘Īd ul-’Aḍḥā) or the Festival of Sacrifice is a religious festival celebrated by Muslims and Druze worldwide as a commemoration of God's forgiveness of Ibrahim (Abraham) from his vow to sacrifice his son, as commanded by Allah. (Muslim tradition names Ishmael as the son who was to be sacrificed, whereas the Judeo-Christian tradition names Isaac.) It is one of two Eid festivals celebrated by Muslims, whose basis comes from the Quran. (Muslims in Iran celebrate a third, non-denominational Eid.) Like Eid el-Fitr, Eid ul-Adha begins with a short prayer followed by a sermon (khuṭba).