Pour out
'Pouring out the vials upon the earth, which contained the plagues,' in Revelation 16:1, signifies influx of the reformed into the church, or into people who study and receive the doctrine of justification by faith alone.
(Referencias: Apocalypse Explained 16; Apocalypse Revealed 676)
Matthew 12:43-45
43
But the unclean spirit, when he is gone out of the man, passes through waterless places, seeking rest, and doesn't find it.
44
Then he says, 'I will return into my house from which I came out,' and when he has come back, he finds it empty, swept, and put in order.
45
Then he goes, and takes with himself seven other spirits more evil than he is, and they enter in and dwell there. The last state of that man becomes worse than the first. Even so will it be also to this evil generation."