Exodus 9:8-12 Revised Standard Version (RSV)
The Sixth Plague: Boils
8 And the Lord said to Moses and Aaron, “Take handfuls of ashes from the kiln, and let Moses throw them toward heaven in the sight of Pharaoh. 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. 12 But the Lord hardened the heart of Pharaoh, and he did not listen to them; as the Lord had spoken to Moses.