Abu Hurairah narrated that people among the Companions of the Prophet (S.A.W) would say:"Truffles are the earth's smallpox." So the Messenger of Allah (S.A.W) said: "Truffles are a form of manna, and its liquid is a cure for the eye. Al-'Ajwah is from Paradise, and it contains a cure for poison

English translation · Jami' at-Tirmidhi