The man who passes the sentence should swing the sword.
...Ned always said that the man who passes the sentence should swing the blade, though he never took any joy in the duty. But I would, oh, yes.
The man who passes the sentence should swing the sword. Look her in the eyes before you kill her. See her tears, hear her last words. You owe her that much at least." - Eddard Stark
...the man who passes the sentence should swing the sword." "...a ruler who hides behind paid executioners soon forgets what death is.