Exodus 9:8-12

Young's Literal Translation

⁸ And Jehovah saith unto Moses and unto Aaron, `Take to you the fulness of your hands [of] soot of a furnace, and Moses hath sprinkled it towards the heavens, before the eyes of Pharaoh,

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.

¹² And Jehovah strengtheneth the heart of Pharaoh, and he hath not hearkened unto them, as Jehovah hath spoken unto Moses.