'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.'" (ID)
English reference (ID): Vol. 4, Book 29, Hadith 3320 (ID)
Arabic reference (ID): Book 29, Hadith 3445 (ID)