Hag-seed, hence!
Fetch us in fuel; and be quick, thou’rt best,
If thou neglect’st or dost unwillingly
What I command, I’ll rack thee with old cramps,
Fill all thy bones with aches, make thee roar
That beasts shall tremble at thy din.

– William Shakespeare

The Tempest, Act 1, Scene 2. Prospero uses dehumanizing and demeaning language to Caliban – "hag-seed" (metaphor) – and threatens to employ his magic to inflict pain on him, if he does not willingly obey his commands to fetch in the fuel, and do it quickly. He will rack him with cramps, make his bones ache, and cause him to roar so much that beasts will tremble, he threatens. Prospero shows his own monstrously vindictive and imperialistic side here in his dealings with his slave.