Exodus 8:20 WBT

¹⁸  And the magicians did so with their inchantments to bring forth lice, but they could not: so there were lice upon man and upon beast.

¹⁹  Then the magicians said to Pharaoh, This [is] the finger of God: and Pharaoh's heart was hardened, and he hearkened not to them; as the LORD had said.

²⁰  And the LORD said to Moses, Rise early in the morning, and stand before Pharaoh; (lo, he cometh forth to the water) and say to him, Thus saith the LORD, Let my people go, that they may serve me.

²¹  Else, if thou wilt not let my people go, behold, I will send swarms [of flies] upon thee, and upon thy servants, and upon thy people, and into thy houses: and the houses of the Egyptians shall be full of swarms [of flies], and also the ground on which they [are].

²²  And I will sever in that day the land of Goshen, in which my people dwell, that no swarms [of flies] shall be there; to the end thou mayest know that I [am] the LORD in the midst of the earth.