The beast that you saw was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
All Commentaries on Revelation 17:8 Go To Revelation 17
Irenaeus of Lyons
AD 202
For if it had been declared by Him, he (Antichrist) might perhaps continue for a long period. But now as "he was, and is not, and shall ascend out of the abyss, and goes into perdition"