Exodus 9:8 in the King James Version
And the LORD said unto Moses and unto Aaron, Take to you handfuls of ashes of the furnace, and let Moses sprinkle it toward the heaven in the sight of Pharaoh.
Context
7 Pharaoh sent, and, behold, there was not so much as one of the livestock of the Israelites dead. But the heart of Pharaoh was stubborn, and he didn’t let the people go.
8 The LORD said to Moses and to Aaron, “Take handfuls of ashes of the furnace, and let Moses sprinkle it toward the sky in the sight of Pharaoh.
9 It shall become small dust over all the land of Egypt, and shall be boils and blisters breaking out on man and on animal, throughout all the land of Egypt.”