the locusts

Deuteronomy 28:42
Swarms of locusts will consume all your trees and the produce of your land.

1 Kings 8:37
When famine or pestilence comes upon the land, or blight or mildew or locusts or grasshoppers, when their enemy besieges them in their cities, whatever plague or sickness there is,

Psalm 78:46
He gave their crops to the grasshopper, the fruit of their labor to the locust.

Psalm 105:34, 35
He spoke, and the locusts came--young locusts without number. . . .

Revelation 9:3-7
And out of the smoke, locusts descended on the earth, and they were given power like that of the scorpions of the earth. . . .

very grievous

Exodus 10:5
They will cover the face of the land so that no one can see it. They will devour whatever is left after the hail and eat every tree that grows in your fields.

Joel 1:2-4
Hear this, O elders; and give ear, all who dwell in the land. Has anything like this ever happened in your days or in the days of your forefathers? . . .

before

Exodus 10:6
They will fill your houses and the houses of all your officials and every Egyptian--something neither your fathers nor your grandfathers have seen since the day they came into this land.'" Then Moses turned and left Pharaoh's presence.

Exodus 11:6
Then a great cry will go out over all the land of Egypt, such as never has been heard before, and never will be heard again.

Joel 2:2
a day of darkness and gloom, a day of clouds and blackness. Like the dawn overspreading the mountains a great and strong people appears, such as never was of old, nor will ever be in ages to come.