Bezoars (Bezoaren)

"A bezoar is a mass found trapped in the gastrointestinal system (usually the stomach), though it can occur in other locations. There are several varieties of bezoar, some of which have inorganic constituents and others organic. Bezoars were sought after because they were believed to have the power of a universal antidote against any poison."

Wikipedia

"One can also contract a bezoar by eating too many unripe dates."

Helmut Nickels

"The most important plant in an oasis is the date palm which forms the upper layer. These palm trees provide shade for smaller trees like peach trees, which form the middle layer."

Wikipedia