أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَرْمُلُ الثَّلاَثَ وَيَمْشِي الأَرْبَعَ وَيَزْعُمُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَفْعَلُ ذَلِكَ ‏.‏

It was narrated from Nafi that: Abdulla bin Umar used to walk rapidly for three (rounds), and walk for four, and he said that the Messenger of Allah used to do that. Translation Not Available

Book Ref: Sunan An Nisai Book 24 Hadith 2940
Web Ref:  Sunan An Nisai Vol 3 Book 24 Hadith 2943