Exodus 9:9-11

Revised Standard Version

⁹ And it shall become fine dust over all the land of Egypt, and become boils breaking out in sores on man and beast throughout all the land of Egypt.” ¹⁰ So they took ashes from the kiln, and stood before Pharaoh, and Moses threw them toward heaven, and it became boils breaking out in sores on man and beast. ¹¹ And the magicians could not stand before Moses because of the boils, for the boils were upon the magicians and upon all the Egyptians.