Sharik bin Namlah said: One night I was the guest of Umar bin al-Khattab (may Allah be pleased with him). He fed me cold pieces of a camel's head, and he also gave us olive oil to eat, and said: "This is the blessed oil that Allah, the Mighty and Majestic, mentioned to His Prophet (peace and blessings be upon him)."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 88