Until the roses turn white

In Şirvânî’s pharmacy book, rose syrup is made like this: petals of Nusaybin rose or local roses go into a deep cauldron, boiling water is poured over them, and the lid stays on until the roses turn white. This is repeated seven times or more; then the water is strained and boiled with its own weight of sugar to the thickness of grape molasses. The book says it helps against malaria and thirst and strengthens the stomach.

Source: Muhammed b. Mahmûd eş-Şirvânî, Şifa Bahçesi (Ravdatü’l-ıtr), I. Cilt, tahkik ve çeviri: Muammer Sarıkaya, Celal Turgut Koç, Orman Genel Müdürlüğü Yayınları, Tarih ve Tıp Serisi 1, Ankara (Şirvânî, Şifa Bahçesi (OGM ed.)). This is a folk record, not a treatment recommendation.