Upon the sounding of this trumpet, the things to be observed are, 1. A star falling from heaven to the earth. Some think this star represents some eminent bishop in the Christian church, some angel of the church; for, in the same way of speaking by which pastors are called stars, the church is called heaven; but who this is expositors do not agree. Some understand it of Boniface the third bishop of Rome, who assumed the title of universal bishop, by the favour of the emperor Phocas, who, being a usurper and tyrant in the state, allowed Boniface to be so in the church, as the reward of his flattery. 2. To this fallen star was given the key of the bottomless pit. Having now ceased to be a minister of Christ, he becomes the antichrist, the minister of the devil; and by the permission of Christ, who had taken from him the keys of the church, he becomes the devil's turnkey, to let loose the powers of hell against the churches of Christ. 3. Upon the opening of the bottomless pit there arose a great smoke, which darkened the sun and the air. The devils are the powers of darkness; hell is the place of darkness. The devil carries on his designs by blinding the eyes of men, by extinguishing light and knowledge, and promoting ignorance and error. He first deceives men, and then destroys them; wretched souls follow him in the dark, or they durst not follow him. 4. Out of this dark smoke there came a swarm of locusts, one of the plagues of Egypt, the devil's emissaries headed by the antichrist, all the rout and rabble of antichristian orders, to promote superstition, idolatry, error, and cruelty; and these had, by the just permission of God, power to hurt those who had not the mark of God in their foreheads. 5. The hurt they were to do them was not a bodily, but a spiritual hurt. They should not in a military way destroy all by fire and sword; the trees and the grass should be untouched, and those they hurt should not be slain; it should not be a persecution, but a secret poison and infection in their souls, which should rob them of their purity, and afterwards of their peace. Heresy is a poison in the soul, working slowly and secretly, but will be bitterness in the end. 6. They had no power so much as to hurt those who had the seal of God in their foreheads. God's electing, effectual, distinguishing grace will preserve his people from total and final apostasy. 7. The power given to these factors for hell is limited in point of time: five months, a certain season, and but a short season, though how short we cannot tell. Gospel-seasons have their limits, and times of seduction are limited too. 8. Though it would be short, it would be very sharp, insomuch that those who were made to feel the malignity of this poison in their consciences would be weary of their lives, Rev 9:6. A wounded spirit who can bear? 9. These locusts were of a monstrous size and shape, Rev 9:7, Rev 9:8, etc. They were equipped for their work like horses prepared to battle. (1.) They pretended to great authority, and seemed to be assured of victory: They had crowns like gold on their heads; it was not a true, but a counterfeit authority. (2.) They had the show of wisdom and sagacity, the faces of men, though the spirit of devils. (3.) They had all the allurements of seeming beauty, to ensnare and defile the minds of men - hair like women; their way of worship was very gaudy and ornamental. (4.) Though they appeared with the tenderness of women, they had the teeth of lions, were really cruel creatures. (5.) They had the defence and protection of earthly powers - breastplates of iron. (6.) They made a mighty noise in the world; they flew about from one country to another, and the noise of their motion was like that of an army with chariots and horses. (7.) Though at first they soothed and flattered men with a fair appearance, there was a sting in their tails; the cup of their abominations contained that which, though luscious at first, would at length bite like a serpent and sting like an adder. (8.) The king and commander of this hellish squadron is here described, [1.] As an angel; so he was by nature, an angel, once one of the angels of heaven. [2.] The angel of the bottomless pit; an angel still, but a fallen angel, fallen into the bottomless pit, vastly large, and out of which there is no recovery. [3.] In these infernal regions he is a sort of prince and governor, and has the powers of darkness under his rule and command. [4.] His true name is Abaddon, Apollyon - a destroyer, for that is his business, his design, and employment, to which he diligently attends, in which he is very successful, and takes a horrid hellish pleasure; it is about this destroying work that he sends out his emissaries and armies to destroy the souls of men. And now here we have the end of one woe; and where one ends another begins.

They had tails like unto scorpions - This may refer to the consequences of their victories. They infected the conquered with their pernicious doctrines.
Their power was to hurt men five months - The locusts make their principal ravages during the five summer months. But probably these may be prophetic months, as above, in Rev 9:5 - 150 years.

And they had tails like unto scorpions,.... Locusts are said to have the tail of a serpent, and of the vipers of the earth (u); See Gill on Rev 9:3, Rev 9:5. And there were stings in their tails; either in the baser sort of them, the Saracens and Papists; or in their doctrines, the prophet being the tail, Isa 9:15; with which both Mahomet, who set himself up for a prophet, and the Romish clergy, who set up their decrees and unwritten traditions above the word of God, have poisoned and destroyed multitudes of souls:

and their power was to hurt men five months; See Gill on Rev 9:5.

(u) Scriptores Arab.

tails like unto scorpions--like unto the tails of scorpions.

and there were stings--There is no oldest manuscript for this reading. A, B, Aleph, Syriac, and Coptic read, "and (they have) stings: and in their tails (is) their power (literally, 'authority': authorized power) to hurt."