Exodus 9:10

So they took some dust from the fire, and placing themselves before Pharaoh, Moses sent it out in a shower up to heaven; and it became a skin-disease bursting out on man and on beast.

Deuteronomy 28:27

The Lord will send on you the disease of Egypt, and other sorts of skin diseases which nothing will make well.

Treasury of Scripture Knowledge

Summary

And they took ashes of the furnace, and stood before Pharaoh; and Moses sprinkled it up toward heaven; and it became a boil breaking forth with blains upon man, and upon beast.

Bible References

A boil

Deuteronomy 28:27
The Lord will send on you the disease of Egypt, and other sorts of skin diseases which nothing will make well.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain