And that more wondrous was, in either jaw
  Three ranks of iron teeth enraunged were,
  In which yet trickling blood and gobbets raw
  Of late devoured bodies did appear,
  That sight thereof bred cold congealed fear:
  Which to increase, and as at once to kill,
  A cloud of smothering smoke and sulphur sear
  Out of his stinking gorge forth steamed still,
That all the air about with smoke and stench did fill.

Book I, Canto XI