You see, sir, between the two of us we do know them all. I think it be a small fault.

– Arthur Miller

The Crucible, Act 2. John Proctor says this to Hale, when John is asked to recite the ten commandments but forgets the seventh, "Thou shalt not commit adultery." This is an example of irony, because John has committed adultery with his former young servant Abigail Williams.