Revelation 9:3-5

3Then locusts came out of the smoke and they came down on the earth. They received power to cause great pain, like the power of scorpions.

4They knew that they must not do anything bad to the grass on the earth. They must not attack any plant or any tree. They could only attack people who did not have God's seal on the front of their heads.

5The locusts did not have authority to kill those people. But they could cause them very bad pain for five months. Their pain was like the great pain from a scorpion when it hurts someone.