Exodus 9:8-11

8Then the Lord said to Moses and Aaron, “Take a handful of ashes from a kiln, and have Moses throw them up in the air as Pharaoh watches.

9They will become a fine dust throughout Egypt. The dust will cause boils to break into open sores on people and animals throughout Egypt.”

10They took ashes from a kiln and stood in front of Pharaoh. Moses threw the ashes up in the air, and they caused boils to break into open sores on people and animals.

11The magicians couldn’t compete with Moses because they had boils like all the other Egyptians.