Elijah (ɪˈlaɪdʒə ; ʾĒlīyyāhū, meaning "My God is Yahweh/YHWH"; Greek form: Elias ɪˈlaɪəs ) was, according to the Books of Kings in the Hebrew Bible, a prophet and a miracle worker who lived in the northern kingdom of Israel during the reign of King Ahab (9th century BCE). In 1 Kings 18, Elijah defended the worship of the Hebrew God over that of the Canaanite deity Baal. God also performed many miracles through Elijah, including resurrection, bringing fire down from the sky, and entering heaven alive "by fire." He is also portrayed as leading a school of prophets known as "the sons of the prophets." Following his ascension, Elisha, his disciple and most devoted assistant, took over his role as leader of this school. The Book of Malachi prophesies Elijah's return "before the coming of the great and terrible day of the ," making him a harbinger of the Messiah and of the eschaton in various faiths that revere the Hebrew Bible. References to Elijah appear in Sirach, the New Testament, the Mishnah and Talmud, the Quran, the Book of Mormon, and Baháʼí writings.
In Judaism, Elijah's name is invoked at the weekly Havdalah rite that marks the end of Shabbat, and Elijah is invoked in other Jewish customs, among them the Passover Seder and the brit milah (ritual circumcision). He appears in numerous stories and references in the Haggadah and rabbinic literature, including the Babylonian Talmud. According to some Jewish interpretations, Elijah will return during the End of Times.
The Christian New Testament notes that some people thought that Jesus was, in some sense, Elijah, but it also makes clear that John the Baptist is "the Elijah" who was promised to come in Malachi 3:1; 4:5. According to accounts in all three of the Synoptic Gospels, Elijah appeared with Moses during the Transfiguration of Jesus.
Elijah in Islam appears in the Quran as a prophet and messenger of God, where his biblical narrative of preaching against the worshipers of Baal is recounted in a concise form.