Sahih Muslim
Sahih Muslim Book 023, Hadith Number 5088.
Hadith Section/Book: Sahih Muslim Sahih Muslim Book 23. Drinks
Chapter : Excellence of truffles and their use as a medicine for the eyes.
Sa'id b. Zaid reported Allah's Messenger (may peace be upon him) as saying: Truffles are 'Manna' which Allah, the Exalted the Majestic, sent to the people of Israil, and its juice is a medicine for the eyes.