Gargantua and Pantagruel on Airs, Waters, Places: “To this purpose Hippocrates also writeth in his book, De Aere, Aqua et Locis, that in his time there were people in Scythia as impotent as eunuchs”
The Pillars of the Earth on On Regimen: “They were the classics: Avicenna's Poem on Medicine, Hippocrates' Diet and Hygiene, Galen's On the Parts of Medicine, and De Urinis by Isaac Judaeus.”