The court physician Ibn Jumay wrote the treatise *On Lemon, Its Drinking and Use*.
Ibn Jumayʿ was a 12th-century Egyptian Jewish physician who served as chief physician at the court of Saladin. His work belonged to a medical tradition that treated foods, drinks, and their effects as subjects worthy of detailed study.
The treatise is associated with early written discussions of lemon-based beverages. In Mamluk Egypt, people consumed drinks made with lemons, dates, and honey, as well as a sweetened lemon-juice drink called qatarmizat. These were predecessors of later lemonade traditions, although recipes and terminology varied widely.
A common mix-up is confusing Ibn Jumay with Ibn al-Baytar, another major figure in medieval Arabic pharmacology. Ibn Jumay is the physician specifically linked to this lemon treatise, while Ibn al-Baytar is better known for his encyclopedic work on medicinal plants and substances.