Exodus 9:10-12

Revised Geneva Translation

¹⁰ Then they took ashes from the furnace and stood before Pharaoh. And Moses sprinkled them toward the sky. And boils broke out into sores upon man, and upon beast.

¹¹ And the sorcerers could not stand before Moses, because of the boils: for the boils were upon the enchanters and upon all the Egyptians.

¹² And the LORD hardened the heart of Pharaoh; and he did not listen to them (as the LORD had said to Moses).