Mishkat al-Masabih #4373

Abu Huraira told that when some of the companions of God's messenger remarked to him that truffles are the smallpox of the earth he replied: “Truffles are a kind of manna, and their juice is a remedy for the evil eye. The 'ajwa dates come from paradise, and they are a remedy for poison.” Abu Huraira said that he took three, five, or seven truffles, pressed them, put their juice in a bottle and applied it as an eye-lotion to a slavegirl of his who was blear-eyed, and she recovered. Tirmidhi transmitted it, saying this is a hasan tradition.