"Thou poisonous slave, got by the devil himself upon thy wicked dam, come forth
Caliban & Prospero
"As wicked dew as e'er my mother brush'd with ravens feather from unwholesome fen drop on you both! a south-west blow on ye and blister you all o'er !
"For this, be sure, to-night thou shalt have cramps. side stitches that shall pen thy breath up; urchins shall, for that vast of night that they may work, All exercise on thee. thou shalt be pinch'd as thick as honeycomb, each pinch more stinging, than bees made em.
In this image prospero is causing an argument with caliban as he refers caliban to a "poisonous slave" after prospero quotes this 'CALIBAN ENTERS'