In fact, all of the holy Companions of the Holy Prophet were consummate followers of the Sunnah; they used to imitate each and every prophetic action. But some Companions, in this too, commanded a distinguished position, for they used to be extremely careful about it. One such Companion was Hazrat Abdullah ibn Umar. Not only while residing in the holy city Madina did he retain in his mind each and every pause and movement of the Holy Prophet's as to what he used to do at a particular time, but during a journey too he used to be very much concerned about it, so much so that when the Holy Prophet went for the Hajj-journey, Abdullah ibn Umar committed to memory every action of his and every place as to where he dismounted from the dromedary, (she camel) where he performed the instinja (ritual purification) where he did ablution and where he said the prayer. He remembered every action, and its time and place. So whenever he went for Hajj or happened to pass along the road, he would get down at the place where the Holy Prophet had stopped for convenience, even though he really did not need to, and would perform ablution where his noble master had performed it. It is because of this care that indications of the Holy Prophet's auspicious route for Hajj and its Sunnahs and stages are found mostly in Abdullah Ibn Umar's traditions.
When oppression and tyranny were at their peak during Hajjaj bin Yusuf's time, Abdullah ibn Umar intended to go for Hajj .The attendants tried to dissuade him as the routes were not safe. Perhaps he might not reach Mecca and hence it was not opportune to embark on a journey. But he did not agree and remained firm in his intention and said: "When the Holy Prophet had begun the journey with the intention of performing the umrah, there was no peace at that time also. Danger was everywhere. That is, postponement of this journey on account of danger would be contrary to the Sunnah. "And if I am stopped from reaching the House of Allah (K'abah), even then the Holy Prophet's Sunnah will be discharged, for he too had been stopped and he, having slaughtered the sacrificial animal and getting tonsured, had put out the Ihram. I am also taking the sacrificial animal with me. If I am stopped, I too will do the same thing which the Prophet had done on this occasion.”