Locust: Symbolical
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Revelation 9:3–10
And out of the smoke, locusts descended on the earth, and they were given power like that of the scorpions of the earth. / They were told not to harm the grass of the earth or any plant or tree, but only those who did not have the seal of God on their foreheads. / The locusts were not given power to kill them, but only to torment them for five months, and their torment was like the stinging of a scorpion.