'Abdullah bin Sa'eed narrated that his grandfather said:
"Iheard AbuHurairah say: The Messenger of Allah (ﷺ) said: 'Eat(olive) oil andanoint yourselves with it, for it is blessed.'" (RU)
English reference (RU): Vol. 4, Book 29, Hadith 3320 (RU)
Arabic reference (RU): Book 29, Hadith 3445 (RU)