Fire is an element of theophany in the Hebrew Bible's burning bush, pillar of fire, and the Eternal flame of the Menorah.
The highest form of sacrifice is the Korban Olah, performed twice-daily, which is an animal sacrifice completely consumed by fire.
In the New Testament, the Holy Spirit is manifested as "tongues of flame".
The Qarmatians, a branch of Ismailism (in turn a branch of Shia Islam) claimed to have found the Mahdi in the 10th century and appointed him caliph, but later deposed him because of an ensuing power struggle. Among his so-called heretical beliefs were fire worship and book burning of religious texts.
Holy fire in the Church of the Holy Sepulchre in Jerusalem has been consecutively documented since 1106 A.D. It is considered by many to be the longest-attested annual miracle in the Christian world.
End of the world fires
Bible contains references to significant cosmological fires that in New Testament letters have the meaning of ultimate destruction of this world before the creation of a new world of justice.
The Book of Revelations has an eternal lake of fire as the ultimate punishment of the Evil.
Mostly in the Gospel of Matthew Jesus says that in the coming life some people will be thrown out into Gehenna. There was a Gehenna in Herodian period Jerusalem, a burning place for garbage in the deep valley on the southern side of Jerusalem, Gae Bne Hinnom, the Valley of the sons of Hinnom, from which the Greek word Gehenna.
It has been told that Gehenna was a detested place because of the bad smell from rotten garbage, fires and smoke and also the fact that criminal's bodies were thrown there after execution covered only by lime.
The Gehenna in the language of Jesus is thus not a very cosmic place in the structure of the Universe but the word has a rather local Jerusalem based meaning from which it may have, of course, expanded to include spiritual realities.
During the First Crusade it was said that it took some six months to burn the bodies in the Valley of Gehenna of the victims from the slaughter of conquered Jerusalem in 1099 AD.