Ibrahim bin Abi Ablah says: I went with Ibn al-Daylami until we came to Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him), and he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "In senna and sannut there is a medicine for every disease." Ibrahim was asked: "What is sannut?" He said: "Have you not heard the words of the poet?" (The verse speaks of) ghee with sannut, free of any adulteration, and of people who keep their neighbour from enjoying it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19581