Exodus 8:18-19 NKJV
Now the magicians so worked with their enchantments to bring forth lice, but they could not. So there were lice on man and beast. Then the magicians said to Pharaoh, “This is the finger of God.” But Pharaoh’s heart grew hard, and he did not heed them, just as the LORD had said.
NKJV: New King James Version