Chapter 28 — Part III: The Decalogue — The Fifth Commandment
Section 23. David, thinking of this with a mind divinely illumined, complained bitterly of the bloodthirsty in these words: Their feet are swift to shed blood. He does not simply say, they kill, but, they shed blood, words which serve to mark the enormity of that execrable crime and to denote the barbarous cruelty of the murderer. With a view also to describe in particular how the murderer is precipitated by the impulse of the devil into the commission of such a crime, he says: Their feet are swift.