The Fifth Stricture is a book found in Dishonored.
[Excerpt from a work detailing one of the Seven Strictures]
Restrict the Rampant Hunger or the intemperate will rise up among you like a virulent swarm, devouring everything wherever they go, even filth. For what goes into your body, poisons you, and if you eat filth then filth is what you will vomit up. Surely the glutton will sell away birthright, family, and friends for a morsel of meat.