Wisdom and goodness to the vile seem vile.
Filths savour but themselves. What have you done?
Tigers, not daughters, what have you performed?
A father, and a gracious agèd man,
Whose reverence even the head-lugged bear would lick,
Most barbarous, most degenerate, have you madded.
Could my good brother suffer you to do it?

– William Shakespeare

King Lear, Act 4, Scene 2. Albany has had enough of his wife Goneril and her sister Regan. Using an apt animal metaphor, he says they have behaved like tigers and not daughters in their barbaric mistreatment of King Lear. He accuses them of driving insane their kindly old father, whom even an angry bear would have been gentle with.