Exodus 8:17-19

Young's Literal Translation

¹⁷ And they do so, and Aaron stretcheth out his hand with his rod, and smiteth the dust of the land, and the gnats are on man and on beast; all the dust of the land hath been gnats in all the land of Egypt.

¹⁸ And the scribes do so with their flashings, to bring out the gnats, and they have not been able, and the gnats are on man and on beast;

¹⁹ and the scribes say unto Pharaoh, `It [is] the finger of God;' and the heart of Pharaoh is strong, and he hath not hearkened unto them, as Jehovah hath spoken.