Whoe’er he be that in this foul proceeding
Hath thus beguiled your daughter of herself
And you of her, the bloody book of law
You shall yourself read in the bitter letter,
After your own sense.
– William Shakespeare
Othello, Act 1, Scene 3. The Duke of Venice promises Brabantio justice, declaring that whoever has beguiled his daughter with witchcraft will pay the price. Brabantio can choose the penalty, he says, even if the Duke’s own son is the perpetrator. This is a good example of dramatic irony, the Duke and Senators being unaware that the person they are talking about is the "valiant Othello", appointed by the Duke to lead the army against the Turks.