Quinquagesima Sunday. He is the patron saint of those in the hospitality industry. The Eastern Orthodox Church commemorates him as the "Righteous Forefather Abraham", with two feast days in its liturgical calendar. The first time is on 9 October (for those churches which follow the traditional Julian Calendar, 9 October falls on 22 October of the modern Gregorian Calendar), where he is commemorated together with his nephew "Righteous Lot". The other is on the "Sunday of the Forefathers" (two Sundays before Christmas), when he is commemorated together with other ancestors of Jesus. Abraham is also mentioned in the Divine Liturgy of Basil the Great, just before the Anaphora, and Abraham and Sarah are invoked in the prayers said by the priest over a newly married couple. Some Christian theologians equate the "three visitors" with the Holy Trinity, seeing in their apparition a theophany experienced by Abraham (see also the articles on the Constantinian basilica at Mamre and the church at the so-called "Oak of Mamre"). Islam Islam regards Abraham as a link in the chain of prophets that begins with Adam and culminates in Muhammad. Ibrāhīm is mentioned in 35 chapters of the Quran, more often than any other biblical personage apart from Moses. He is called both a hanif (monotheist) and muslim (one who submits), and Muslims regard him as a prophet and patriarch, the archetype of the perfect Muslim, and the revered reformer of the Kaaba in Mecca. Islamic traditions consider Ibrāhīm the first Pioneer of Islam (which is also called millat Ibrahim, the "religion of Abraham"), and that his purpose and mission throughout his life was to proclaim the Oneness of God. In Islam, Abraham holds an exalted position among the major prophets and he is referred to as "Ibrahim Khalilullah", meaning "Abraham the Beloved of God". Besides Ishaq and Yaqub, Ibrahim is among the most honorable and the most excellent men in sight of God. Ibrahim was also mentioned in Quran as "Father of Muslims" and the role model for the community. Druze The Druze regard Abraham as the third spokesman (natiq) after Adam and Noah, who helped transmit the foundational teachings of monotheism (tawhid) intended for the larger audience. He is also among the seven prophets who appeared in different periods of history according to the Druze faith. Mandaeism In Mandaeism, Abraham () is mentioned in Book 18 of the Right Ginza as the patriarch