(29) باب الإِهْلاَلِ مُسْتَقْبِلَ الْقِبْلَةِ
Narrated Nafi`:
Whenever Ibn `Umar intended to go to Mecca he used to oil himself with a sort of oil that had no pleasant smell, then he would go to the Mosque of Al-Hulaita and offer the prayer, and then ride. When he mounted well on his Mount and the Mount stood up straight, he would proclaim the intention of assuming Ihram, and he used to say that he had seen the Prophet (ﷺ) doing the same.
Reference: Sahih al-Bukhari 1554
In-book reference: Book 25, Hadith 40
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 26, Hadith 625