Exodus 9:10

So they took soot from a kiln, and stood before Pharaoh; and Moses threw it toward the sky, and it became boils breaking out with sores on man and beast.

Deuteronomy 28:27

The Lord will smite you with the boils of Egypt and with tumors and with the scab and with the itch, from which you cannot be healed.

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 smite you with the boils of Egypt and with tumors and with the scab and with the itch, from which you cannot be healed.