It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Truffles (kam'ah) are a kind of 'manna', and their water is a cure for the eye; and Ajwah (dates) are from Paradise, and they are a cure for poison."
The narrator said: The Messenger of Allah (peace and blessings be upon him) prescribed the fat tail of a ram as a treatment for sciatica ('irq al-nasa).
Imam al-Tabarani (may Allah have mercy on him) said: "We have not heard it from anyone except Ibn Ghulayb, and it is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) only through this route."
Hadith Referenceالمعجم الأوسط / باب الحاء / 3406
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 226، 228، 7، والنسائي فى «السنن الكبرى» برقم: 6635، والطحاوي فى «شرح مشكل الآثار» برقم: 5673، والطبراني فى «الكبير» برقم: 12481، 13010، والطبراني فى «الصغير» برقم: 344»