Exodus 8:19
18. And the magicians did so with their enchantments to bring forth lice, but they could not: so there were lice upon man, and upon beast.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.
Exodus თავი 8