'Boils' in the Bible

It will become fine dust over the entire land of Egypt. It will become festering boils on man and beast throughout the land of Egypt.”

So they took furnace soot and stood before Pharaoh. Moses threw it toward heaven, and it became festering boils on man and beast.

And the magicians could not stand before Moses because of the boils; for the boil was upon the magicians, and upon all the Egyptians.