Exodus 9, 8 – 12 „So the LORD said to Moses and Aaron: Each of you take handfuls of soot from a kiln, and in the presence of Pharaoh let Moses scatter it toward the sky. 9It will turn into fine dust over the whole land of Egypt and cause festering boils on human being and beast alike throughout the land of Egypt. 10So they took the soot from a kiln and appeared before Pharaoh. When Moses scattered it toward the sky, it caused festering boils on human being and beast alike. 11Because of the boils the magicians could not stand in Moses’ presence, for there were boils on the magicians as well as on the rest of the Egyptians. 12But the LORD hardened Pharaoh’s heart, and he would not listen to them, just as the LORD had said to Moses”.