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 doing the same.

وَقَالَ أَبُو مَعْمَرٍ حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، قَالَ كَانَ ابْنُ عُمَرَ ـ رضى الله عنهما ـ إِذَا صَلَّى بِالْغَدَاةِ بِذِي الْحُلَيْفَةِ أَمَرَ بِرَاحِلَتِهِ فَرُحِلَتْ ثُمَّ رَكِبَ، فَإِذَا اسْتَوَتْ بِهِ اسْتَقْبَلَ الْقِبْلَةَ قَائِمًا، ثُمَّ يُلَبِّي حَتَّى يَبْلُغَ الْمَحْرَمَ، ثُمَّ يُمْسِكُ حَتَّى إِذَا جَاءَ ذَا طُوًى بَاتَ بِهِ حَتَّى يُصْبِحَ، فَإِذَا صَلَّى الْغَدَاةَ اغْتَسَلَ، وَزَعَمَ أَنَّ رَسُولَ اللَّهِ ﷺ فَعَلَ ذَلِكَ. تَابَعَهُ إِسْمَاعِيلُ عَنْ أَيُّوبَ فِي الْغَسْلِ.