L. M. Grant's Commentary on the Bible - Revelation 9:1-21
The Fifth Trumpet: A Demon Infestation (vv. 1-12) The sounding of the fifth trumpet discloses "a star fallen from heaven:" it is already fallen (v. 1). This is the same star that fell under the third trumpet (Revelation 8:10). Thus the false prophet, the Antichrist, is given the key to the pit of the abyss. His opening it (v. 2) releases a smoke that darkens the sun and the air. This is the darkening and polluting of the very atmosphere of people's existence by satanic doctrine that will... read more
Geneva Study Bible - Revelation 9:19
9:19 For their power is in their mouth, and in their tails: {14} for their tails [were] like unto serpents, and had heads, and with them they do hurt.(14) That is, they are harmful on all sides: on whatever part you put your hand to them, or they touch you, they do hurt. So the former are called Scorpions, Revelation 9:3 . read more