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.
(Referencat: Apocalypse Explained 16; Apocalypse Revealed 676)
Ezekiel 21:14-15
14
You therefore, son of man, prophesy, and strike your hands together; and let the sword be doubled the third time, the sword of the deadly wounded: it is the sword of the great one who is deadly wounded, which enters into their rooms.
15
I have set the threatening sword against all their gates, that their heart may melt, and their stumblings be multiplied: ah! it is made as lightning, it is pointed for slaughter.