It fits with the mystery Babylon of Revelation
http://www.jesus-christ-forums.com/islam/articles.php?article=1
The Two Witnesses will be killed where Jesus was crucified at Mount Calvary.
Today the Dome of the Rock, an impressive Moslem mosque constructed in 691 A.D, occupies Mount Moriah in Jerusalem. A large out cropping of rock inside the temple is identified as the traditional site of the intended sacrifice.
5. And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.
6. And I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus: and when I saw her, I wondered with great admiration.
7. And the angel said unto me, Wherefore didst thou marvel? I will tell thee the mystery of the woman, and of the beast that carrieth her, which hath the seven heads and ten horns.