Exodus 9:9-11

Young's Literal Translation

⁹ and it hath become small dust over all the land of Egypt, and it hath become on man and on cattle a boil breaking forth [with] blains, in all the land of Egypt.'

¹⁰ And they take the soot of the furnace, and stand before Pharaoh, and Moses sprinkleth it towards the heavens, and it is a boil [with] blains, breaking forth, on man and on beast;

¹¹ and the scribes have not been able to stand before Moses, because of the boil, for the boil hath been on the scribes, and on all the Egyptians.