Exodus 9:9-11
Read Exodus 9 in full →9“And it will become fine dust over all the land of Egypt, and it will become aboils breaking out with sores on man and beast through all the land of Egypt.” 10So they took the soot from the kiln and stood before Pharaoh; and Moses tossed it toward the sky, and it became boils breaking out with sores on man and beast. 11aAnd the 1magicians could not stand before Moses because of the boils, for the boils were on the magicians 2as well as on all the Egyptians.