Sahih Bukhari Volume 2, Book 25, Hadith 1645

حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدِ بْنِ مَيْمُونٍ، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا طَافَ الطَّوَافَ الأَوَّلَ خَبَّ ثَلاَثًا وَمَشَى أَرْبَعًا، وَكَانَ يَسْعَى بَطْنَ الْمَسِيلِ إِذَا طَافَ بَيْنَ الصَّفَا وَالْمَرْوَةِ‏.‏ فَقُلْتُ لِنَافِعٍ أَكَانَ عَبْدُ اللَّهِ يَمْشِي إِذَا بَلَغَ الرُّكْنَ الْيَمَانِيَ قَالَ لاَ‏.‏ إِلاَّ أَنْ يُزَاحَمَ عَلَى الرُّكْنِ فَإِنَّهُ كَانَ لاَ يَدَعُهُ حَتَّى يَسْتَلِمَهُ‏

Narrated By Nafi' : Ibn 'Umar said, "When Allah's Apostle performed the first Tawaf he did Ramal in the first three rounds and then walked in the remaining four rounds (of Tawaf of the Ka'ba), where as in performing Tawaf between Safa and Marwa he used to run in the midst of the rain-water passage," I asked Nafi', "Did 'Abdullah (bin 'Umar) use to walk steadily on reaching the Yemenite Corner?" He replied, "No, unless people were crowded at the Corner; otherwise he would not leave it without touching it."