Revelation 11:7

11:7 When they have completed their testimony, the beast that comes up from the abyss will make war on them and conquer them and kill them.

Revelation 17:8

17:8 The beast you saw was, and is not, but is about to come up from the abyss and then go to destruction. The inhabitants of the earth – all those whose names have not been written in the book of life since the foundation of the world – will be astounded when they see that the beast was, and is not, but is to come.