Exodus 9:7-9

New Revised Standard Version, Anglicised

⁷ Pharaoh inquired and found that not one of the livestock of the Israelites was dead. But the heart of Pharaoh was hardened, and he would not let the people go.

The Sixth Plague: Boils

⁸ Then the Lord said to Moses and Aaron, ‘Take handfuls of soot from the kiln, and let Moses throw it in the air in the sight of Pharaoh. ⁹ It shall become fine dust all over the land of Egypt, and shall cause festering boils on humans and animals throughout the whole land of Egypt.’