The Messenger of Allah ﷺ said, "Truffles are a kind of manna, and their juice is a cure for the eye. The Ajwa date is from Paradise, and it is a cure for poison."
حدثنا أسباط بن محمد حدثنا الأعمش حدثنا جعفر بن إياس عن شهر بن حوشب
قال رسول الله ﷺ الكمأة من المن وماؤها شفاء للعين والعجوة من الجنة وهي شفاء من السم
Its chain of transmission is hasan due to Shahr bin Hawshab, and the hadith was mentioned previously at 10587.