The locusts swarmed across the land and settled over the entire territory of Egypt. Never before had there been so many locusts, and never again will there be.
Here is, I. The invasion of the land by the locusts - God's great army, Joe 2:11. God bids Moses stretch out his hand (Exo 10:12), to beckon them, as it wee (for they came at a call), and he stretched forth his rod, Exo 10:13. Compare Exo 9:22 23.
Commenting on Exodus 10:12-20
And the locusts went up over all the land of Egypt,.... Being raised up by the wind in the places where they were generated, they flew and spread themselves all over the land, being in a wonderful manner produced and multiplied by the power of God: and rested in all the coasts of Egypt; in every part of it where the Egyptians dwelt, and where...
Before them there were no such locusts, etc. - They exceeded all that went before, or were since, in number, and in the devastations they produced. Probably both these things are intended in the passage. See Exo 10:15.