Exodus 8:19-21

21st Century King James Version

¹⁹ Then the magicians said unto Pharaoh, “This is the finger of God.” And Pharaoh’s heart was hardened, and he hearkened not unto them, as the Lord had said.

²⁰ And the Lord said unto Moses, “Rise up early in the morning and stand before Pharaoh. Lo, he cometh forth to the water, and say unto 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 whereon they are.