Ranger's Apprentice Book Two: The Burning Bridge

This time the stakes are higher. You have no rights, Morgarath. You're a rebel and a traitor and a murderer. Surrender now and your men will be spared. That's the only right I grant you. "I claim the right of trial by single combat!" Morgarath shouted back, ignoring the King's words. Then he continued contemptuously; "Or are you too cowardly to accept a challenge?"