2 He unlocked the Well of the Abyss - smoke poured out of the Well, billows and billows of smoke, sun and air in blackout from smoke pouring out of the Well. 3 Then out of the smoke crawled locusts with the venom of scorpions. 4 They were given their orders: "Don't hurt the grass, don't hurt anything green, don't hurt a single tree - only men and women, and then only those who lack the seal of God on their foreheads." 5 They were ordered to torture but not kill, torture them for five months, the pain like a scorpion sting. 6 When this happens, people are going to prefer death to torture, look for ways to kill themselves. But they won't find a way - death will have gone into hiding. 7 The locusts looked like horses ready for war. They had gold crowns, human faces, 8 women's hair, the teeth of lions, 9 and iron breastplates. The sound of their wings was the sound of horse-drawn chariots charging into battle. 10 Their tails were equipped with stings, like scorpion tails. With those tails they were ordered to torture the human race 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.