Continuing on with the seven angels who were to blow their trumpets for the seventh seal that had been broken in heaven, we see that the fifth angel signals a time that Satan is given the key to the Abyss. He opens the shaft to the Abyss and from it comes a smoke that, within it, is found the demons of Hell.
When he opened the Abyss, smoke rose from it like the smoke from a gigantic furnace. The sun and sky were darkened by the smoke from the Abyss. And out of the smoke locusts came down on the earth and were given power like that of scorpions of the earth. They were told not to harm the grass of the earth or any plant or tree, but only those people who did not have the seal of God on their foreheads. They were not allowed to kill them but only to torture them for five months. And the agony they suffered was like that of the sting of a scorpion when it strikes. During those days people will seek death but will not find it; they will long to die, but death will elude them.
Revelation 9:2-6
We see here that these locusts are the creatures that come up from the Abyss, out of the pit of Hell. Their power is to torture, but it is limited to that as God does not give them the power to kill. These locusts do not prey upon the grass, upon plants, or upon trees, as normal locusts would, but instead upon those who do not have the seal of God on their foreheads.
So those that God has not sealed are the ones that they are allowed to torture. What is this seal? This the seal of the Holy Spirit as we’ve seen previously in other scriptures such as in 2 Corinthians:
Now it is God who makes both us and you stand firm in Christ. He anointed us, set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.
2 Corinthians 1:21-22
Or in the book of Ephesians:
And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit, who is a deposit guaranteeing our inheritance until the redemption of those who are God’s possession—to the praise of his glory.
Ephesians 1:13-14
As we can see here, when we have heard the message of salvation, the Gospel, and we have believed in Christ and his message, God gives us the Holy Spirit. We are sealed in Christ. We are marked with the seal of the Holy Spirit, and that is the seal that we must have so that we will not experience this terrible trial from the seventh broken seal of the scroll. God has given us a way to be marked in Him, but that way is only through Christ. May we be found in Christ on that day, sealed by the Holy Spirit and not tormented by the spirits from out of the depths of the Abyss.