John the Baptist [note 1] (c. 1st century BC – c. AD 30) was a Judaean preacher active in the area of the Jordan River in the early 1st century AD. He is also known as Saint John the Forerunner in Eastern Orthodoxy, John the Immerser in some Baptist Christian traditions, Saint John by certain Catholic churches, and Prophet Yahya in Islam. He is sometimes alternatively referred to as John the Baptiser.
John is mentioned by the Roman Jewish historian Josephus and he is revered as a major religious figure in Christianity, Islam, the Baháʼí faith, the Druze faith, and Mandaeism, the latter in which he is considered to be the final and most vital prophet. He is considered to be a prophet of God by all of the aforementioned faiths, and is honoured as a saint in many Christian denominations. According to the New Testament, John anticipated a messianic figure greater than himself, and the Gospels portray John as the precursor or forerunner of Jesus. Jesus himself identifies John as "Elijah who is to come", which is a direct reference to the Book of Malachi that has been confirmed by the angel who announced John's birth to his father, Zechariah. According to the Gospel of Luke, John and Jesus were relatives.
Some scholars maintain that John belonged to the Essenes, a semi-ascetic Jewish sect who expected a messiah and practiced ritual baptism. John used baptism as the central symbol or sacrament of his pre-messianic movement. Most biblical scholars agree that John baptized Jesus, and several New Testament accounts report that some of Jesus' early followers had previously been followers of John.