The revenges we are bound to take upon your traitorous father are not fit for your beholding.

– William Shakespeare

King Lear, Act 3, Scene 7. When Cornwall advises Edmund to leave with Goneril and says this to him, we know that Cornwall is going to exact some horrible revenge on Gloucester for being "traitorous" (for Cornwall Gloucester’s "betrayal" is aiding King Lear).