English: The famous quote "Ecclesia abhorret a sanguine" is never found in any document of the Catholic Church. It has been created by François Quesnay in his history of surgery in France written in the year 1744. The image is the scan of the page containing the quote. This is its first ever source. No older sources can be found. (See the discussion of this source in Charles H. Talbot, Medicine in Medieval England, London: Oldbourne, 1967). See however Gregorius IX, Decretalium compilatio, LIBER III, TITULUS L, CAP. IX. "Clericus nec dictare nec proferre sententiam sanguinis debet, nec quicquam aliud exercere, per quod ad vindictam sanguinis tendatur, vel purgatione vulgari opem praestare non debet", forbidding any clerical involvement in the effusion of blood.