Exodus 9:10

And they took the soot of the furnace and stood before Pharaoh; and Moses sprinkled it up toward heaven; and boils breaking forth with blisters came upon man and upon beast

Deuteronomy 28:27

The LORD will smite thee with the boil of Egypt and with the hemorrhoids and with the scab and with the itch, of which thou canst not 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 thee with the boil of Egypt and with the hemorrhoids and with the scab and with the itch, of which thou canst not be healed.