Usefulness: It sharpens the eyesight and dissipates flatulence.
Dangers: It augments the sperm and dampens the desire for coitus.
Neutralization of the Dangers: With foods that multiply the sperm.
Ibn Butlan of Baghdad. Tacuinum Sanitatis, a medieval handbook on wellness (eleventh century AD)
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LAERTES. A document in madness, thoughts and remembrance fitted.
OPHELIA. There's fennel for you, and columbines: there's rue for you; and here's some for me: we may call it herb-grace o' Sundays: O you must wear your rue with a difference. There's a daisy: I would give you some violets, but they withered all when my father died: they say he made a good end.
William Shakespeare. Hamlet
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He rubbed the flesh just above the leather cuff that attached the peg to his stump.
“Have you tried rubbing it with Balm of Gilead?” I asked. “Water-pepper or stewed rue might help too.”
Diana Gabaldon. Outlander (1991)
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I was at last bold enough to walk the street in his company, but kept my nose well stopped with rue, or sometimes with tobacco.
Jonathan Swift. Gulliver's Travels Into Several Remote Regions of the World (1726)