Shama-il Tirmidhi
Shama-il Tirmidhi Chapter 025, Hadith Number 008 (150).
Hadith Section/Book: Shama-il Tirmidhi Chapter 25. Description Of The Curry Of Rasoolullah
It is related from 'Umar Radiyallahu 'Anhu that Rasulullah Sallallahu Aayhi Wasallam said: "Use olive oil in cooking and rubbing (on the body) because it is from a mubaarak tree".
Commentary.
The reason for mentioning this hadith in the practices of Sayyidina Rasulullah Sallallahu'Alayhi Wasallam is, that if he encouraged the use of olives, he must have used it himself.