And Yahya ibn Habib al-Harithi narrated to us, Hammad ibn Zayd narrated to us, Muhammad ibn Shabib narrated to us, he said: I heard it from Shahr ibn Hawshab, so I asked him, and he said: I heard it from Abd al-Malik ibn Umayr. He said: Then I met Abd al-Malik, and he narrated to me from Amr ibn Hurayth, from Sa'id ibn Zayd, who said: The Messenger of Allah, peace and blessings be upon him, said: "The truffle is from manna, and its water is a cure for the eye."