>Revelations
Revelation, full stop.
Fallen stars are apostates, as described by Jude, "wandering stars". Wormwood is described by a prophet in the Old Testament as "false prophets", or at least what they are teaching, "bitter" things. Next, the star "Wormwood" is the Man of Sin as promised by Paul the Apostle which would appear after the Great Apostasy came to full maturity. The Harlot of Revelation 17 is the apostate church led by that Man of Sin.
However, as for Islam, that was the plague of the sixth bowl (or vial). The bowl plagues were a result of the Harlot and the Man of Sin's war against the Saints for not denying the Testimony of Christ.
It's no coincidence the office of that Man of Sin was created/given him in 536 AD by Emperor Justinian I (the same one for whom the Justinian Plagues are named); and that Mohammed was born in 570 AD, merely a generation afterward.