Exodus 9:8-10

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;