2 He opened the pit of the abyss, and smoke went up out of the pit, like the smoke from a [1] burning furnace. The sun and the air were darkened because of the smoke from the pit. 3 Then out of the smoke came forth locusts on the earth, and power was given to them, as the scorpions of the earth have power. 4 They were told that they should not hurt the grass of the earth, neither any green thing, neither any tree, but only those people who don’t have God’s seal on their foreheads. 5 They were given power not to kill them, but to torment them for five months. Their torment was like the torment of a scorpion, when it strikes a person. 6 In those days people will seek death, and will in no way find it. They will desire to die, and death will flee from them. 7 The shapes of the locusts were like horses prepared for war. On their heads were something like golden crowns, and their faces were like people’s faces. 8 They had hair like women’s hair, and their teeth were like those of lions. 9 They had breastplates, like breastplates of iron. The sound of their wings was like the sound of chariots, or of many horses rushing to war. 10 They have tails like those of scorpions, and stings. In their tails they have power to harm men for five months.
Matthew Henry's Commentary on Revelation 9:2-10
Commentary on Revelation 9:1-12
(Read Revelation 9:1-12)
Upon sounding the fifth trumpet, a star fell from heaven to the earth. Having ceased to be a minister of Christ, he who is represented by this star becomes the minister of the devil; and lets loose the powers of hell against the churches of Christ. On the opening of the bottomless pit, there arose a great smoke. The devil carries on his designs by blinding the eyes of men, by putting out light and knowledge, and promoting ignorance and error. Out of this smoke there came a swarm of locusts, emblems of the devil's agents, who promote superstition, idolatry, error, and cruelty. The trees and the grass, the true believers, whether young or more advanced, should be untouched. But a secret poison and infection in the soul, should rob many others of purity, and afterwards of peace. The locusts had no power to hurt those who had the seal of God. God's all-powerful, distinguishing grace will keep his people from total and final apostacy. The power is limited to a short season; but it would be very sharp. In such events the faithful share the common calamity, but from the pestilence of error they might and would be safe. We collect from Scripture, that such errors were to try and prove the Christians, 1 Corinthians 11:19. And early writers plainly refer this to the first great host of corrupters who overspread the Christian church.