Exodus 9:10-12

21st Century King James Version

¹⁰ And they took ashes from the furnace and stood before Pharaoh, and Moses sprinkled it up toward heaven; and it became boils breaking forth with blains upon man and upon 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.

¹² And the Lord hardened the heart of Pharaoh, and he hearkened not unto them, as the Lord had spoken unto Moses.