Revelation 17:11

And the beast that once existed, but now does not, is actually the eighth one [i.e., head/hill/king. See verse 9], and yet he belongs to the seven; and he will go to his destruction.

Revelation 17:8

The beast you saw once existed, but now does not, and [yet] is about to come up out of the pit and go to [his] destruction. And those people living on the earth, whose names have not been recorded in the book of life from the creation of the world, will be amazed when they see the beast, because he had once existed, but now does not, and yet will come [again].

Treasury of Scripture Knowledge

Summary

And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.

That was

Bible References

That was

Revelation 17:8
The beast you saw once existed, but now does not, and [yet] is about to come up out of the pit and go to [his] destruction. And those people living on the earth, whose names have not been recorded in the book of life from the creation of the world, will be amazed when they see the beast, because he had once existed, but now does not, and yet will come [again].