Exodus 9:10

And they take the soot of the furnace, and stand before Pharaoh, and Moses sprinkleth it towards the heavens, and it is a boil with blains, breaking forth, on man and on beast;

Deuteronomy 28:27

'Jehovah doth smite thee with the ulcer of Egypt, and with emerods, and with scurvy, and with itch, of which thou art not able to 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
'Jehovah doth smite thee with the ulcer of Egypt, and with emerods, and with scurvy, and with itch, of which thou art not able to be healed.