Mark 9:26
And it did come out, after shrieking aloud and convulsing him violently. The child turned like a corpse, so that most people said, "he is dead";
Mark 9:20
So they brought the boy to him, and when the spirit saw Jesus it at once convulsed the boy; he fell on the ground and rolled about, foaming at the mouth.
Mark 1:26
And after convulsing him the unclean spirit did come out of him with a loud cry.
Mark 9:18
and whenever it seizes him it throws him down, and he foams at the mouth and grinds his teeth. He is wasting away with it; so I told your disciples to cast it out, but they could not."
Revelation 12:12
Rejoice for this, O heavens and ye that dwell in them! But woe to earth and sea! The devil has descended to you in fierce anger, knowing that his time is short."